donundeen

I've been looking at ftom for converting frequency numbers to midi note numbers, but I'd also like to get more discrete pitch control of my synthesizer, using pitch bend messages as well.

Assuming I can set the pitch wheel width on my Novation to 1/2 step, what's the best way to convert frequency into midi note, and pitch-bend values? The equation for ftom ( expr log10($f1/8.175798) / log10(1.0594633) ) sort of blows my mind, so I'm thinking calculating the pitch-bend would be some sort of similar type of equation. 

Surely someone else has already figured this out?

Hi, 
I've been looking at ftom for converting frequency numbers to midi note numbers, but I'd also like to get more discrete pitch control of my synthesizer, using pitch bend messages as well.
Assuming I can set the pitch wheel width on my Novation to 1/2 step, what's the best way to convert frequency into midi note, and pitch-bend values? The equation for ftom ( expr log10($f1/8.175798) / log10(1.0594633) ) sort of blows my mind, so I'm thinking calculating the pitch-bend would be some sort of similar type of equation. 
Surely someone else has already figured this out?

frequency-to-midi-with-pitch-bend

I don't feel particularly good about this patch, but I think it does 

On Feb 4, 2008, at 6:22 PM, don undeen wrote:

> I've been looking at ftom for converting frequency numbers to midi 

> note numbers, but I'd also like to get more discrete pitch control 

> of my synthesizer, using pitch bend messages as well.

> Assuming I can set the pitch wheel width on my Novation to 1/2 step, 

> what's the best way to convert frequency into midi note, and pitch- 

> bend values? The equation for ftom ( expr log10($f1/8.175798) / 

> log10(1.0594633) ) sort of blows my mind, so I'm thinking 

> calculating the pitch-bend would be some sort of similar type of 

> Surely someone else has already figured this out?

"The greatest of the changes that science has brought us is the acuity 

of change; the greatest novelty the extent of novelty."

I don't feel particularly good about this patch, but I think it does  
what you want...

>
> Hi,
> I've been looking at ftom for converting frequency numbers to midi  
> note numbers, but I'd also like to get more discrete pitch control  
> of my synthesizer, using pitch bend messages as well.
> Assuming I can set the pitch wheel width on my Novation to 1/2 step,  
> what's the best way to convert frequency into midi note, and pitch- 
> bend values? The equation for ftom ( expr log10($f1/8.175798) /  
> log10(1.0594633) ) sort of blows my mind, so I'm thinking  
> calculating the pitch-bend would be some sort of similar type of  
> equation.
> Surely someone else has already figured this out?
>
> thanks all!
> don

San Francisco, CA
Work: 857-544-3967
Email: bthrew (at) gmail (dot) com
IM: captogreadmore (AIM)
http://www.barrythrew.com

"The greatest of the changes that science has brought us is the acuity  
of change; the greatest novelty the extent of novelty."
- J. Robert Oppenheimer


> The equation for ftom ( expr log10($f1/8.175798) / log10(1.0594633) )

> sort of blows my mind, so I'm thinking calculating the pitch-bend

> would be some sort of similar type of equation. Surely someone else

You would just translate the fractional part of the ftom result to a 

pitchbend value, but beware, the range of the pitchbend is not 

standardized, and could be anything between a half step and two octaves. 

You define it on the receiving synth. Just scale the fractional part to 

don undeen schrieb:
> The equation for ftom ( expr log10($f1/8.175798) / log10(1.0594633) )
> sort of blows my mind, so I'm thinking calculating the pitch-bend
> would be some sort of similar type of equation. Surely someone else
> has already figured this out?

You would just translate the fractional part of the ftom result to a 
pitchbend value, but beware, the range of the pitchbend is not 
standardized, and could be anything between a half step and two octaves. 
You define it on the receiving synth. Just scale the fractional part to 
the pitchbend value (not tested):

-- 
Stefan Tiedje------------x-------
--_____-----------|--------------
--(_|_ ----|-----|-----()-------
-- _|_)----|-----()--------------
----------()--------www.ccmix.com


> Just scale the fractional part to the pitchbend value (not tested):

Just realised, the proposed scaling is bending over the half step 

instead of a quarter step, but you get the idea. (I'll leave the further 

Stefan Tiedje schrieb:
> Just scale the fractional part to the pitchbend value (not tested):

Just realised, the proposed scaling is bending over the half step 
instead of a quarter step, but you get the idea. (I'll leave the further 
bug fixing to you... ;-)

This brings back memories. Before multi-timbral synthesizers there was a

dinosaur called the Yamaha TX816. It was 8 TX7 in a box. Each could play

one timbre at a time and reach had its own pitch bend wheel. To achieve

microtonality we used the fractional part of a midi number to set the pitch

bend position (see patch below). In my 1988 piece "Fractal Mountains" (link

below) you can hear this. It in 96 tones per octave.

http://www.timara.oberlin.edu/~gnelson/mp3s/Long.mp3s.html

NOTE: Pitch bend changes everything in the channel so notes already sounding

> I don't feel particularly good about this patch, but I think it does

> #P comment 430 250 54 196617 Pitch Bend;

> #P number 395 250 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

> #P newex 395 229 109 196617 scale -0.5 0.5 -64 63;

> #P newex 395 187 166 196617 if $f1 < 0.5 then $f1 else out2 $f1;

> #P number 18 250 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

> #P newex 18 146 374 196617 expr int($f1)+($f1>=0)*(($f1-

> #P newex 18 123 228 196617 expr log10($f1/8.175798) / log10(1.0594633);

> #P flonum 18 106 66 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;

> #P comment 53 250 110 196617 Base MIDI Note Number;

> On Feb 4, 2008, at 6:22 PM, don undeen wrote:

>> I've been looking at ftom for converting frequency numbers to midi

>> note numbers, but I'd also like to get more discrete pitch control

>> of my synthesizer, using pitch bend messages as well.

>> Assuming I can set the pitch wheel width on my Novation to 1/2 step,

>> what's the best way to convert frequency into midi note, and pitch-

>> bend values? The equation for ftom ( expr log10($f1/8.175798) /

>> log10(1.0594633) ) sort of blows my mind, so I'm thinking

>> calculating the pitch-bend would be some sort of similar type of

>> Surely someone else has already figured this out?

This brings back memories.  Before multi-timbral synthesizers there was a
dinosaur called the Yamaha TX816.  It was 8 TX7 in a box.  Each could play
one timbre at a time and reach had its own pitch bend wheel.  To achieve
microtonality we used the fractional part of a midi number to set the pitch
bend position (see patch below).  In my 1988 piece "Fractal Mountains" (link
below) you can hear this. It in 96 tones per octave.

NOTE: Pitch bend changes everything in the channel so notes already sounding
will bend too.

> I don't feel particularly good about this patch, but I think it does
> what you want...
>
> b
>
> #P window setfont "Sans Serif" 9.;
> #P window linecount 1;
> #P comment 430 250 54 196617 Pitch Bend;
> #P number 395 250 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
> #P newex 395 229 109 196617 scale -0.5 0.5 -64 63;
> #P newex 551 206 33 196617 - 1.;
> #P newex 395 187 166 196617 if $f1 < 0.5 then $f1 else out2 $f1;
> #P number 18 250 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
> #P newex 18 146 374 196617 expr int($f1)+($f1>=0)*(($f1-
> int($f1))>=0.5)-($f1
> #P newex 395 146 29 196617 t f i;
> #P newex 395 167 29 196617 - 0.;
> #P newex 18 123 228 196617 expr log10($f1/8.175798) / log10(1.0594633);
> #P flonum 18 106 66 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
> #P comment 53 250 110 196617 Base MIDI Note Number;
> #P connect 3 0 7 0;
> #P connect 2 0 5 0;
> #P fasten 2 0 4 0 23 143 400 143;
> #P connect 9 0 10 0;
> #P fasten 8 0 9 0 556 226 400 226;
> #P connect 7 0 9 0;
> #P connect 7 1 8 0;
> #P connect 5 0 6 0;
> #P connect 4 1 3 1;
> #P connect 4 0 3 0;
> #P connect 1 0 2 0;
> #P window clipboard copycount 12;
>
>
> On Feb 4, 2008, at 6:22 PM, don undeen wrote:
>
>>
>> Hi,
>> I've been looking at ftom for converting frequency numbers to midi
>> note numbers, but I'd also like to get more discrete pitch control
>> of my synthesizer, using pitch bend messages as well.
>> Assuming I can set the pitch wheel width on my Novation to 1/2 step,
>> what's the best way to convert frequency into midi note, and pitch-
>> bend values? The equation for ftom ( expr log10($f1/8.175798) /
>> log10(1.0594633) ) sort of blows my mind, so I'm thinking
>> calculating the pitch-bend would be some sort of similar type of
>> equation.
>> Surely someone else has already figured this out?
>>
>> thanks all!
>> don
>
> --
> Barry Threw
> Media Art and Technology
>
> San Francisco, CA
> Work: 857-544-3967
> Email: bthrew (at) gmail (dot) com
> IM: captogreadmore (AIM)
> http://www.barrythrew.com
>
> "The greatest of the changes that science has brought us is the acuity
> of change; the greatest novelty the extent of novelty."
> - J. Robert Oppenheimer
>

Cheers
Gary Lee Nelson
Oberlin College
www.timara.oberlin.edu/GaryLeeNelson

On 5 Feb 2008, at 16:03, Gary Lee Nelson wrote:

> This brings back memories. Before multi-timbral synthesizers there 

> dinosaur called the Yamaha TX816. It was 8 TX7 in a box.

To be pedantic: eight TF1's. (There was also a rack unit called a 

TX216, which was two TF1's and a chunk of empty space...)

> This brings back memories.  Before multi-timbral synthesizers there  
> was a
> dinosaur called the Yamaha TX816.  It was 8 TX7 in a box.

To be pedantic: eight TF1's. (There was also a rack unit called a  
TX216, which was two TF1's and a chunk of empty space...)

Nick Rothwell / Cassiel.com Limited
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www.myspace.com/cassieldotcom
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www.loadbang.net


Frequency to Midi WITH pitch-bend?