Brian, try Audacity wave file editor. It does allow changing speed of
playback and it allows recording simultaneous as you playback. Speed is
directly related to frequency/pitch, so slowing speed also
lowers pitch, proportionately. This is the same principle that is used by
Polyphone or Viena soundfont editors when one sample (e.g. 1046.3 Hz) is
used for different pitches within an octave or for the entire compass of the
keyboard, the transposition to specific, individual frequencies of other
pitches, being done by the computer, relative to the assignment of a "root
key" relative to the MIDI key number.
If you don't have Audacity, download it, and when opened, click on the
"Help">Manual which will open with the browser and insert this:
It will show you the transcription toolbar and explain the aspects of
varying playback speed and pitch change which results.
Sent: Wednesday, March 29, 2017 6:57 AM
To: [hidden email] Subject: [jOrgan-user] Setting sample playback speed on the fly
Is it possible to re-play a sample, at a speed that you can determine on the
fly? My reason for asking, is that I am trying to re-create my Yamaha organ
rhythm section. I have recordings of all the rhythms, at one speed. I was
wonderig if it is possible to replay them at variable speeds using on the
fly setting in jOrgan?
I already have 2 manuals working on my Raspberry Pi organ project, and I am
thrilled at the sound quality it produces. This little organ now sounds
better than the day it came off the factory floor in the mid to late 70's.
I wa hoping it would be possible to speed up or slow down, without changing the pitch of the sample, from withing the soundfont. This is because it is a recording of the 'drum section', playing a specific 'style'.
That's exactly what happens with the jOrgan recorder. If you change the playback speed, the speed changes but not the pitch, you are just sending note-on/note-off messages to the synthesizer at a different rate, the note numbers, hence the pitch, stay the same.
I just tried it and noticed that, although you can type numbers into the speed panel, that doesn't work, you have to use the speed up/down buttons and wind to the speed you want.
I wa hoping it would be possible to speed up or slow down, without changing
the pitch of the sample, from withing the soundfont. This is because it is
a recording of the 'drum section', playing a specific 'style'.