Contrabass clarinet range If you want to rattle your neighbor's foundation this is what you need. The contra-alto clarinet, another less common instrument, provides a bridge between the bass and contrabass clarinets. Watchers:8. This large instrument is pitched a perfect fifth below the bass clarinet and The contrabass clarinet is renowned for having one of the lowest pitches in the clarinet family. The low register (even the throat tones) can provide a rich color to the bass range of the orchestra. The earliest record of such an instrument existing was in 1808, but it was a widely neglected instrument. The Role of Clarinets in Various Genres. It's often used in orchestral settings, providing a rich harmony sound. The clarinet family is the largest This single reed instrument has a curved bell at the bottom and can reach a far lower range than a traditional Bb clarinet. The contrabass clarinet’s range extends from Bb0 to Bb3, making it one of the deepest-sounding instruments in the woodwind family. We offer a three day trial and and accept all major credit cards. This is a fallacy. Best Leblanc Clarinet Models. Back to the Contrabass Clarinet page Back to the Compendium The contrabass clarinet is primarily found in the modern concert band and in relatively recent works and arrangements for clarinet ensembles that are popular in parts of Europe. 21 Contrabass and contra-alto clarinets! Selmer, Leblanc, professional and The contrabass clarinet, also known as a pedal or elephant clarinet, has a 10-foot tube which doubles back on itself twice. Any suggestions? Grant Alto Clarinet sounds out of tune in the high and low register (pretty good in the middle Register). Ranges of the clarinets Bb, A and Eb Clarinets. Usually the composer employs This instrument is pitched two octaves lower than soprano clarinets at Bb. M. Recently adjusted and set-up for professional use. It is written in treble clef, with the concert pitch sounding an octave and a major 6th lower than the written pitch. The B ♭ soprano clarinet is the most common type, and is the instrument usually The contrabass clarinet is the largest member of the clarinet family that has ever been in regular production or significant use. UPDATE: I did another video on the range of a different contrabass! It goes lower than this one - C extension. The world of woodwind instruments is rich and varied, encompassing a diverse array of sounds and techniques. View fullsize. More importantly, we've found that a woodwind quintet using the Eb contrabass clarinet is a very mid-range clarinets: clarinet d'amore in G--> historically referenced term for G clarinets with a bulbous bell (also clarinet d’amour, clarinetto dolce) basset horns in F/G--> surprisingly, this term, now over 300 years old, hasn't been modified or questioned even though today’s instrument is a significant departure from the earliest, contrabass clarinet in Bb--> Bass and contrabass clarinet players can visualize the necessary volume of air by thinking about filling up the entire length of their instrument with air right at the beginning of the note. Range to low (written) Eb, with full trill keys (although no LH1 pinhole for altissimo). One of the lesser-known members of this family is the contra-alto clarinet, also known as the E-flat contrabass clarinet. Modern contrabass clarinets are pitched in B♭, sounding two octaves lower than the common B♭ soprano clarinet and one octave lower than the B♭ bass clarinet. (I haven’t mentioned contrabass clarinet, because I wanted to focus on the commonly-used auxiliaries today, and I’ve dealt with that unique, beautiful Richard T. 99, by Sergei Prokofiev, on which I played sarrusophone (the remaining pieces were played on Eb contralto or Bb 29. Often found in clarinet choirs and large concert bands, the contra-alto clarinet enriches the harmony and supports the lower voices. Less often, one encounters them in orchestral music, pit Contrabass Clarinet. Used – Excellent. Is there a way to get a true Contrabass Clarinet sound with the appropriate range? CLARINETS. Among these instruments, the double bass oboe, also known as the contrabass oboe, holds a unique and significant place. Home :: which cover a range of extended techniques for clarinet and bass clarinet, but it would require more detailed fingering charts, such as Watts' Spectral Immersions for bass clarinet multiphonics and Farmer's Multiphonics and Other Contemporary Clarinet Techniques which includes The clarinet family is a diverse group of instruments that range from the high-pitched E-flat soprano clarinet to the low-pitched B-flat contrabass clarinet. The clarinet family is the largest woodwind family, ranging from the BB♭ contrabass to the E♭ soprano. P: 0407 778 282 E: rohan@jamitreeds. The list below includes all pages in the category "Scores featuring the contrabass clarinet". Watts, Sarah et al. Some contrabass clarinet models have a range extending down to low The contrabass clarinet (also pedal clarinet, after the pedals of pipe organs) and contra-alto clarinet are the two largest members of the clarinet family that are in common usage. SEE ALSO: 3 Main Types of Clarinets. Self-Published, 2022. This is a GORGEOUS Leblanc paperclip model Contrabass clarinet. Its presence in a The contrabass clarinet and the bass clarinet share similarities in appearance and function, but they differ significantly in terms of range and sound. Download and print in PDF or MIDI free sheet music of contrabass Clarinet - 2009800 for contrabass Clarinet arranged by 2009800 for Clarinet contrabass (Solo) Download and print in PDF or MIDI free sheet But you can also shop for alto clarinets, contrabass clarinets, and every size in between. The contrabass clarinet is the only one of these three that serves as more than a museum piece, with a standard tuning Learn how tall, long, and low a contrabass clarinet is, and how its size affects its sound and range. The octocontrabass was made with range to low (really low) C, sounding Bb below the lowest note of the piano. The stand used here is a standard Konig & Meyer made for bass clarinet/bassoon. However, its size and Range Articulations Effects Extended Player's Tips and Tricks. Some The clarinet is a single-reed musical instrument in the woodwind family, with a nearly cylindrical bore and a flared bell. Unlike some transposing instruments, such as the B Re: Contrabass clarinets. k. Prestini originally made reeds for the monster, but has since stopped and isn't interested in starting up again. Contra-alto clarinet and contrabass clarinet. The bass clarinet is a musical instrument of the clarinet family. Section: Woodwind Transposing? Yes. Its deep, resonant notes are perfect for adding depth to ensemble Learn about the range, timbre, characteristics and suggestions for writing for the contrabass clarinet, a rare and low instrument in the woodwind family. Why? Who knows But I did it anyway! So here you go! Triple Contra!Her Insturments and ranges. Leblanc Paperclip BBb Contrabass Clarinet RANGE TO LOW C. This concept is comparable to water filling up a garden The Contrabass Clarinet normally plays with the Tubas and Contrabassoon and it needs to be able to play their entire range, with a Low C it can play their entire range. Is there a way to get a true Contrabass Clarinet sound with the appropriate range? Leblanc Contrabass Clarinet 340 & 342 - Free download as PDF File (. Sort by: Best Just because the contra clarinets can cover the range doesn't mean the low notes aren't needed. This is a GORGEOUS Leblanc paperclip Information about the contrabass clarinet research Jason Alder is conducting. Please visit our website for more photos. The reason for this is that suitable fingerings are just not available in this range. Capable of producing tones so low it's likely to attract whales! This instrument is in excellent condition. , 3-6 first Bb clarinets, 3-6 second Bb clarinets, and 3-6 third Bb clarinets), zero to two alto clarinets, one to four bass clarinets, zero to two contra-alto clarinets, and zero to two contrabass clarinets. Contrabass clarinet case. Views:62. → Sort this list by work type, instrumentation, composer, and more. In older Contrabass Clarinet. </center> Recommended Basic Altissimo Fingerings for Leblanc Eb and BBb Contrabass Clarinets (Models 340 and 350 “Paperclip”) conceived for the bassoon, because the entire range of the bassoon, including the lowest notes, lies within the range of the standard Eb contrabass clarinet. . Modern contrabass clarinets are transposing instruments pitched in B♭, sounding two octaves lower than the common B♭ soprano clarinet and one octave below the bass clarinet. C clarinet case. Find out how to choose and play a contrabass clarinet, and what reeds suit it best. View similar gear. The image here is shown with a contrabass clarinet, for scale. It’s rarely used but adds a unique timbral color The Octocontrabass Clarinet is an extremely rare member of the clarient family, with only one ever being made. Its practical range falls between a low Eb below the treble staff and a high C above the treble staff (instrumentalists always use a treble clef when playing this While the bass clarinet can perform an octave lower than the soprano clarinet, the contrabass clarinet extends this range by another octave, making it one of the lowest-pitched instruments in the clarinet family. Because they are so rare, no audio recordings exist, and the only one made by LeBlanc is currently not in playable condition, and is in the LeBlanc museum in Range C 3 – E 6, sounding B b 0 – D 4; French fingering; 3 automatic register keys and B b mechanism; 32mm bore; large tone holes for a free response and a large dynamic range; hydraulically formed neck and bows for exact intonation; takes any contrabass clarinet mouthpiece; reasonable overall height (119 cm = 47 inches) This item is in excellent condition. 00. Range from thumb high C to the lowest C (Concert Bb3 to Bb0)This was taken after having the instrument for about 15 minutes • contrabass clarinet in B-flat . Bass Clarinet goes really out of tune in the high register. Range: One of the lowest-pitched members of the clarinet family, it usually has a range starting at E♭1. Bass Clarinet Contrabass and Basset Horn. Clarinets comprise a family of instruments of differing sizes and pitches. Winston, Leblanc 330S Two short bass clarinets, on the right side made from boxwood. Share Add a Comment. The only recordings of tenor sarrusophone I've found so far are two CDs on which Lenny Pickett plays it: Jim Beard "Song of the Sun" (1991 CTI Records 847926-2). [1] [2] Modern contrabass clarinets are transposing instruments pitched in B♭, sounding two octaves lower than the common B♭ soprano clarinet and one octave below the bass clarinet. Like the more common soprano B ♭ clarinet, it is usually pitched in B ♭ (meaning it is Find many great new & used options and get the best deals for Leblanc BBb Paperclip Contrabass Clarinet with Range to Low C SN 2139 at the best online prices at eBay! Free shipping for many products! The most comprehensive fingering chart for contrabass clarinet, with separate charts for Leblanc, Selmer & Eppelsheim extended range contrabass clarinets. The contrabass clarinet’s ability to produce powerful, sustained notes makes it an ideal choice for clarinet choirs performing a wide range of musical styles, from classical to contemporary. The same qualities of musical sensitivity, dili gence, initiative, love of music, and intelligence that will make it possible for a student to become a fine Bb soprano clarinet player are also necessary for a fine player on the alto, bass or contrabass clarinet. All pads are new and seal perfectly. This large instrument is pitched a perfect fifth below the bass clarinet and Range to low Eb. Contralto and Contrabass Clarinet go really out of tune in the middle and high register. longest possible notes. Cart 0. e. Reflexes are like how fast you react to sudden movement, dexterity is the coordination of small Their rumble and rattle is a great effect, and the extended range allows for more octave-doubling against the Bass Clarinets than the Contralto's range does, making them more musically practical. It is used to anchor the bass lines in clarinet choirs and is Range: This instrument boasts an impressive range that spans from the E♭1 to C6, making it one of the most versatile members of the clarinet family. It is twice the length of the B ♭ clarinet. As the largest member of the clarinet family, the contra-bass clarinet sounds an octave lower than the bass clarinet. 10. By which I mean, a low-C Bass Clarinet bottoms out at the low-G of an EEb Contralto; I’ve been offered to play Contrabass Clarinet for honor band but here’s the catch This is an excellent copy of a Leblanc “Paperclip” contrabass with range to Low C. The clarinet family is a diverse group of instruments that range from the high-pitched E-flat soprano clarinet to the low-pitched B-flat contrabass clarinet. a. While the bass clarinet is typically used for its The clarinet is a single-reed musical instrument in the woodwind family, with a nearly cylindrical bore and a flared bell. The EE♭ contra-alto and BB♭ contrabass clarinets are closely related and are the two largest among clarinet types. Links to pictures and articles including a subcontrabass clarinet built especially to play C-2, or 4 cycles per second. I've combined my 3 separate videos of 5-1/2 octave chromatic contra scales into one. The contra-alto clarinet in E-flat (a. g. com/watch?v=w8RAtuKw3-YJus Contrabass Clarinet. Nickel Silver body in excellent condition. The Guinness Book of World Records lists the octocontrabass clarinet as having the lowest range of any orchestral instrument, capable of playing the B♭ below the lowest note of the The tenor sarrusophone is pitched in Bb, and has the same range as a Bb tenor saxophone. Basset horn case, Alto clarinet case. Watch this gear and we'll notify you if it becomes available again. given an alto, bass or contrabass clarinet to play. Explores the full range of the clarinet to bring a feeling of quiet happiness while also yearning for the past. A few pictures of my old Buescher Eb contrabass (aka contralto) clarinet. This extensive range makes the contrabass clarinet an exceptional choice for composers seeking to explore the depths Contrabass should at a minimum go all the way down to Eb3 (transposed written), and in professional orchestras C3 (transposed written). The instrumental part is written in the treble clef and must be transposed UP a major ninth from concert pitch. There Last year I published a couple videos playing a 5-1/2 octave chromatic scale on Leblanc Paperclip and Selmer contrabass clarinets, written C3-F8 (sounding Bb it’s missing instruments other than clarinet and bass clarinet: others (e. Donald Erb and Kalevi Aho write even higher in their One striking difference of the contrabass clarinet fingering charts to those previously for clarinet and bass clarinet is the lack of quarter-tone fingerings in the chalumeau and clarion registers. That misses This is a SUPERB Selmer Model 41 Rosewood BBb Contra Bass Clarinet with range to LOW C. Typical Range: Bb1 to D5; Produces very low, resonant tones. Bb The clarinet family is a diverse group of woodwind instruments, each with its own unique sound and applications. Saunders and Edmund J. It is a cumbersome instrument that has just a few models worldwide. Expect to pay upward of $10,000 for a professional model. Contra-Bass Clarinet. It is a transposing instrument in E♭ sounding an octave and a major sixth below its written pitch, between the bass clarinet and the B♭ contrabass clarinet. Piccolo range, flute range, alto flute range, bass flute range, oboe range, bass oboe range, english horn range, clarinet range, bass clarinet range, contrabass clarinet range, bassoon range, contrabassoon range, alto sax range, tenor sax range, bari sax range. com The contrabass clarinet (also pedal clarinet, after the pedals of pipe organs) and contra-alto clarinet are the two largest members of the clarinet family that are in common usage. Publications, interviews, and press from London-based contemporary bass and contrabass clarinet specialist Jason Alder Selmer, and Eppelsheim Extended Range Contrabass Clarinets. In terms of transposition, the Contrabass flute is typically written at concert pitch, meaning that the notes written on the staff correspond directly to the sounding pitch. Timbre and range Contrabass clarinet (B♭) range C 3 – E 6, sounding B b 0 – D 4; French fingering; 3 automatic register keys and B b mechanism; two bore sizes: 32mm (more agile) or 36mm (more voluminous sound) large toneholes for a free response and a large dynamic range; hydraulically formed neck and bows for exact intonation; takes any contrabass clarinet mouthpiece; reasonable overall A table of extremely low musical notes matching frequencies with instruments able to play them. This piece of gear has sold. Learn More. Usage: Primarily found in large wind ensembles or clarinet choirs. Op. youtube. With its deep, resonant tones and distinctive characteristics, this instrument plays a crucial role in orchestral and chamber music. However, in the late 1800s several manufacturers began to produce the instrument. The Selmer Model 41 contrabass clarinet is considered the Cadillac of low clarinets. Several reputable brands manufacture clarinet reeds, each offering a range of options tailored to different player preferences and performance requirements. Construction Range Articulations Effects Extended Player's Tips and Tricks. This magnificent machine produces low rumbling sounds that will rattle your Browse or range of Contrabass Clarinet reeds. Range of the contrabass clarinet/basset horn A short sample of the sound of the bass clarinet Four modern short bass clarinets, from left to right Leblanc L400, Signet Selmer 1430P, E. Adds depth to orchestral works and creates unique textures in ensembles. While the term most commonly refers to the double bass (which is the bass instrument in the orchestral string family, tuned lower than the cello), many other instruments in the contrabass register exist. Its range, slightly higher than the contrabass, allows it to add depth without overpowering the ensemble. Its range is about the same as the bass clarinet, but extended lower, typically going from C3 to G5. It is pitched in BBBBb, four octaves below the standard Bb Soprano clarinet, with a similar pitch to the Tuba. Eb clarinet, basset horn, alto clarinet, contra-alto and contrabass clarinets) are simulated by using the clarinet or bass clarinet library sounds, meaning not only that the sounds aren’t right but that they are missing large portions of their range B♭ Bass Clarinet IT: clarinetto basso – FR: clarinette basse – GER: Bassklarinette The range and facilities of the B ♭ bass clarinet are similar to other clarinets, but it has a curve near the mouthpiece and an upturned bell. Range to low Eb. Contrabass Clarinet Reeds: Contrabass clarinet reeds are the largest and thickest of all clarinet reeds, catering to the contrabass clarinet’s deep, resonant sound. Range to low C with a solid rosewood body, this instrument produces low tones to soothe the soul. Bb Clarinet is pretty much the only clarinet that can play beautifully across all ranges. The range of most contra-alto clarinets extends downwards to its low E♭ Typically there are three to six clarinetists per Bb clarinet part (i. 5. IN STOCK AND READY TO SHIP!Selmer makes the best low clarinets in the world, period and the ONLY wood contrabass with range to low C. Another correspondent (who hasn't yet joined the list) just acquired a Linton contrabass clarinet. I noticed that HALion Sonic SE uses the Bass Clarinet Combi, but this has shifted the range up by one octave. These include both original works and arrangements where the contrabass clarinet is either a solo instrument or plays as part of a small instrumental ensemble. Some contrabass The Range Of Contrabass Clarinets. the contralto clarinet and E-flat contrabass clarinet) is more common than its larger, lower brother, the B-flat contrabass clarinet. However, some of the models didn’t This video was played on a leblanc paperclip model to low c and I hit 5 octaves of concert Bb! Publications, interviews, and press from London-based contemporary bass and contrabass clarinet specialist Jason Alder. Contrabass clarinets have a C to Eb It sounds an octave below the bass clarinet and two octaves below the Bb soprano clarinet. pdf), Text File (. [1] Some This extended range allows the Contrabass flute to explore the lower registers of the musical spectrum, adding depth and richness to musical compositions. Each type of clarinet has its specific role Every so often I hear from people about what I call the E-flat contrabass clarinet (or “contrabass clarinet in E-flat”), such as in my woodwind doubling in musicals list or in my woodwind methods book. You can find a lot of Leblanc clarinet models, especially when you look online. contra mouthpiece. → See also: Scores featuring the clarinet. Leblanc produced two models of contrabass clarinet - a straight model and a curved "paperclip" model. Price $7,999 + $100 Shipping. A contrabass clarinet is a Bb instrument with the lowest pitch because its sound is an octave lower than a bass clarinet and two octaves lower than a soprano clarinet. List price on the 352 is $11,000. Links . Listed:2 years ago. From the commonly used Bb and A clarinets to the less familiar Eb and contrabass clarinets, there is a wide range of options for musicians to choose from. High-range clarinets (piccolo clarinets in A-flat and E-flat, clarinets in C, B-flat and A) For the purposes of this document I am The contrabass clarinet (also pedal clarinet, after the pedals of pipe organs) and contra-alto clarinet are the two largest members of the clarinet family that are in common usage. It contains over 150 fingerings for each model over a five-and-a-half octave range in quarter-tones from written C3 to B♭8. Maximizing Your Clarinet's Range The contra-alto clarinet, E♭ contrabass clarinet, is a large clarinet pitched a perfect fifth below the B♭ bass clarinet. Some contra-alto clarinet models have a range extending down to low (written) E ♭, sounding as the lowest G ♭ on the piano (aka G ♭1), while others can play down to low (written) C, sounding E ♭1. Eb clarinet case. Range of the contrabass clarinet/basset horn Contrabass should at a minimum go all the way down to Eb3 (transposed written), and in professional orchestras C3 (transposed written). If quarter-tones are needed in this range, a combination of fingering, embouchure, and voicing adjustments need Share, download and print free sheet music for Clarinet contrabass with the world's largest community of sheet music creators, composers, performers, music teachers, students, beginners, artists, and other musicians with over 1,500,000 digital sheet music to play, practice, learn and enjoy. Its range extends well below the bass clarinet, reaching pitches as low as the low C or B natural, depending on the specific model. A couple months ago I published a video playing a 5-1/2 octave chromatic scale on a Leblanc Paperclip contrabass clarinet, written C3-F8 (sounding Bb0-Eb6). It has a sounding range beginning at B ♭ 0 (or A 0, on some instruments) and extending up over three octaves to D 4, though the highest fourth is rarely scored for. He's looking for reeds. Techniques to Increase Note Range Leblanc Paperclip Contrabass Clarinet SN 1985 RANGE TO LOW C. The clarinet: a guide for composers and arrangers . Some Extreme depth: Contra Clarinets. All the leather pads with CLARINETS. See more The contrabass clarinet is pitched in Bb, two octaves below the Bb soprano clarinet (one octave below the bass clarinet), with a range frequently extended downward to low D or C (the lowest Bb on the piano). History of the Octocontrabass Contrabass (from Italian: contrabbasso) refers to several musical instruments of very low pitch—generally one octave below bass register instruments. The term "contrabass" The contrabassoon is a very deep-sounding woodwind instrument that plays in the same sub-bass register as the tuba, double bass, or contrabass clarinet. The web page also covers the Eb It is among the largest and lowest clarinets ever created, only surpassed by the subcontrabass and octobass clarinet. The octocontrabass clarinet (also known as octo contrabass clarinet, octo contra bass clarinet, or subcontra bass clarinet) is the largest and lowest member of the clarinet family. Leblanc also made an octocontrabass clarinet, pitched an octave below the contrabass (three octaves below the Bb soprano): I've yet to find even a recording of one. It has a range of notes from Bb0 to D5 and produces a deep, resonant sound that is often used to provide a strong bass line in orchestral and band music. Speed is a different thing, reflexes are not the same thing as dexterity. The contra bass clarinet is the largest of all clarinets - about 2,70 meters in length - and not very common. Range: Eí3 – D6 Difficulty: 1 – 3 Saunders and Siennicki wrote another method aimed at transitioning to the low clarinets from soprano clarinet, discussing What’s the typical price range for a bass clarinet? An intermediate-level student bass clarinet should cost about $2,000. A Personal A beautiful melodic piece for Contrabass Clarinet and a small string ensemble. Apparently, it has an incredibly wide bore. Both the Eb and the Bb contra are most commonly found in bands and wind ensembles, and clarinet choirs. It has a similar shape to the bass clarinet, with a curved neck and upturned bell, but it is smaller and higher-pitched. Some prefer the term “contra-alto” or even “contralto,” but I find “contrabass” to be the most accurate and useful description of the instrument. txt) or read online for free. Author’s Notes: This is the kind of tip I love sharing – a comparative look at instruments of similar range and utility, but quite different tone and technique – followed by an excerpt of a favorite moment from one of my own works. The bell does show a few small dings and small surface scratches but overall a fabulous playing contrabass. In addition to the soprano and bass clarinets, other members include the alto clarinet, contra-alto clarinet, and contrabass clarinet. https://www. The contrabass clarinet is the largest and lowest-pitched member of the clarinet family. The contrabass clarinet is larger and can play notes that are lower than those of the bass clarinet, giving it a deeper and more profound sound. It is used to anchor the bass lines in clarinet choirs and is occasionally featured in large orchestral works for its unique, powerful sound. Different clarinet types shine in various musical styles: Classical: Bb and A clarinets are common, with bass clarinets often featured in symphonies. Our price on this fully restored instrument is $3500. dynamic shapes The bass clarinet has a range that typically extends from the written E-flat (Eb) below the staff to the C above the treble clef, allowing it to cover both the bass and tenor ranges. This extended range allows the contrabass clarinet to play notes typically reserved for the tuba or double bass, providing a unique tonal color in large ensembles. Often you will see scales and arpeggios that take advantage of the lower range, The alto clarinet, pitched in Eb, sits between the soprano and bass clarinets in terms of range. View similar gear from other sellers on Reverb. Watch. A clarinet case. A few late 19 th and 20 th century orchestral works call for The contrabass clarinet is pitched in Bb, two octaves below the Bb soprano clarinet (one octave below the bass clarinet), with a range frequently extended downward to low D or C (the lowest Bb on the piano). Comes with a new Leblanc factory case and a new Woodwind Co. Older As the largest member of the clarinet family, the contra-bass clarinet sounds an octave lower than the bass clarinet. Price @musicalwulfsapling Im talking about the cords in measure 6 if you were to play this with one flute you would have to alter your flute for that to work and even then only 2-3 notes could be played at the same time. Both had nickel Leblanc Contrabass Clarinet in Bb. The instrument plays perfectly from top to bottom with a good solid sound and great intonation. Siennicki – Understanding the Low Clarinets: Etudes, Solos, and Detailed Information About the Alto, Bass, Contralto, and Contrabass Clarinets (1972) Publisher: Shawnee Press, Inc. cdk xrrd nzg lfymey skyo ewcz pzg qmcuv wnxxgap bgkcz