Reeds block ranking

[Mito44]

Dear all,

I am trying to understand the reed blocks logic. I think I am a little bit confused about the amount of reeds and I have some hard time identify the reeds.

I saw that on the blocks there are 2 holes so the first question will be:

Are both side reeds the same note?

How could I identify what note each reed should be only by looking at the block?

Could anybody explain me how this are arranged ?

Many thanks for that

 

[Glug]

Both sides will be the same key/button but usually for different register switches.
NB. each hole provides air to two reeds (one sounding in each bellows direction) at the same pitch, so the same note.

The easiest way to see what notes are where is to press the keys/buttons and see which pallets lift.

Here's the layout on my Scandalli LMMH
(w1 = lowest white key, b1 = lowest black key)
You can see each pallet covers 2 reed blocks = 4 holes = 4 pairs of reeds

 

[Mito44]

Both sides will be the same key/button but usually for different register switches.
NB. each hole provides air to two reeds (one sounding in each bellows direction) at the same pitch, so the same note.

The easiest way to see what notes are where is to press the keys/buttons and see which pallets lift.

Here's the layout on my Scandalli LMMH
(w1 = lowest white key, b1 = lowest black key)
You can see each pallet covers 2 reed blocks = 4 holes = 4 pairs of reeds

Ahaam.

When you are saying that LMMH do you mean that for example for block 1 the L is F3 and H same F3 but one octave higher ?

Is that correct ?

 

[Glug]

Yep, on reed block 1 the L reeds are one octave lower and H one octave higher.
For example the "w1" key is the F below middle C on the keyboard, so its F3 on M or M+ register.

On L register it's actually F2, on H register it's actually F4.

Edit: You can work out which reed banks are which register by removing the reed blocks and moving the register switches - a plate should move to unblock the holes and you can see which reeds are enabled.

 

[dak]

Dear all,

I am trying to understand the reed blocks logic. I think I am a little bit confused about the amount of reeds and I have some hard time identify the reeds.

I saw that on the blocks there are 2 holes so the first question will be:

Are both side reeds the same note?

How could I identify what note each reed should be only by looking at the block?

You can't. Reeds sounding different notes can have exactly the same size. You have to ping the reeds to know which note they are sounding.

Could anybody explain me how this are arranged ?

Many thanks for that

The image you show here has round air holes. Those are not usually closed with register sliders. They will typically be operated by round pallets. That means that both of the holes will be operated likely by pallets that can move independent of one another. That makes it unlikely that they belong to the same note, either because we are talking about a single-voice accordion, or because they belong to different notes in a déclassement (a special construct for a cassotto-like tone quality).

 

[Mito44]

Yep, on reed block 1 the L reeds are one octave lower and H one octave higher.
For example the "w1" key is the F below middle C on the keyboard, so its F3 on M or M+ register.

On L register it's actually F2, on H register it's actually F4.

Edit: You can work out which reed banks are which register by removing the reed blocks and moving the register switches - a plate should move to unblock the holes and you can see which reeds are enabled.

Got it.

Clear now. Apreciate your help!

Wish you all the best!

Salut !

 

[debra]

Although often both sides of a reed block are the same note, or at least correspond to the same key, that is certainly not always the case. When you have a 5 voice accordion with 2+3 setup (2 voices in cassotto, 3 voices outside) then normally you will have 3 reed blocks outside the cassotto on a PA of which the middle reed block has different notes on each side.
On a 3 voice CBA you often have 4 1/2 reed blocks, that's 1 1/2 for each of the first 3 rows of buttons. Typically there will be 2 reed blocks that have notes from a different row of buttons on each side.

 

[Mito44]

Although often both sides of a reed block are the same note, or at least correspond to the same key, that is certainly not always the case. When you have a 5 voice accordion with 2+3 setup (2 voices in cassotto, 3 voices outside) then normally you will have 3 reed blocks outside the cassotto on a PA of which the middle reed block has different notes on each side.
On a 3 voice CBA you often have 4 1/2 reed blocks, that's 1 1/2 for each of the first 3 rows of buttons. Typically there will be 2 reed blocks that have notes from a different row of buttons on each side.

Thanks for explanation!