You can use one of three fingers.
The first is the most recommended one when just playing a regular b flat. Put down your first two fingers on the first and second key then press the bottom side key with your palm. (In other words play an 'A' then as your playing that press the bottom side palm key)
The second fingering is an alternate fingering, used when going through notes chromatically. With your first finger onlypress the first key and the small key underneath it. Your not play 'A' so be careful not to press the second key.
The last fingering is not recommended (At least not by my instructor), but it can be played. Press the first key with your first finger (The 'B') Then press the fourth key with your other first finger. (The 'F' key) These are the only two keys you should have pressed down the other fingers should be up.
These are all fingers for B flat on a Saxophone.
An alto saxophone is in the key of E-Flat, or Eb
The Alto Saxophone is in the key of E flat. That means that an E flat on the Alto Saxophone is the same pitch as a C on a piano or other concert pitch instrument.
Some E-flat instruments include the alto clarinet, sopranino saxophone, alto saxophone, baritone saxophone, contralto clarinet, and the tenor horn. There is even an E-flat tuba, but it's not regularly used.
The most popular members of the saxophone family are the soprano, alto, tenor and baritone saxophone. The soprano is based in the key of B-flat, the alto E-flat, the tenor B-flat and the baritone E-flat. There have been other variations of the saxophone as well, including the sopranino (e-flat), bass (b-flat) contra bass (e-flat) and c melody saxophone.
Alto Saxophone is a concert Eb instrument.
It is in the key of concert Bb. On alto saxophone there is one sharp (F#). There is a link to the sheet music for it in the related links, which includes both piano and alto saxophone.
concert Bb on an alto saxophone is a G three keys on left hand for the Bb on an alto press the B key and use the right hand to press the key needed for F or F# but no fingers in between.
d flat is the same as c sharp. so just the octive key
An (A) Flat on an Alto Saxophone is the same as a (G) Sharp, so the three top keys down as if you were going to play a (G), PLUS the key on the left side of the sax, the key where typically you would place your pinkie. If you need more clarification, look on the internet for an Alto Sax fingering chart.
a saxophone (learn to spell) has no flat keys. There are different keys for each note. There is no individual key for a flat
E flat
Alto Saxophones are in the key of E flat. The Saxophone was invented by Adolph Sax. There are 15 types of saxophones: Bb Sopranissimo, Eb Soprano, Bb Soprano, Eb Alto, Bb Tenor, Eb Baritone, Bb Bass, Eb Contrabass, F Sopranino, C Soprano, F Alto, C Tenor, F Baritone, C Bass, and F Contrabass.