#31 SIDney pitch bend

closed
Nick Copeland
5
2010-12-22
2010-02-26
Andrew C
No

Controlling pitch on the SIDney with the modwheel is very difficult to do accurately.

Implementation of the pitch wheel on this synth would be a very welcome addition!

Andrew.

Discussion

  • Nick Copeland
    Nick Copeland
    2010-02-28

    I am not sure just having a pitchwheel would do it. The pitch control on sidney is a little special, it changes the clock rate by which the soft SID chip is controlled which results in more or less samples per second, or more correctly, samples per wave.

    What exactly are the issues? I could envisage the following:

    1. If you use the centering control then the synth goes immediately out of tune.
    2. If you shift up/down then it is not in tune with other instruments

    Implmenting the same code as the generic emulator pitch shift was not reasonable to do here due to the way all three oscillators are embedded in the soft chip.

    Do you get other issues than the above? I can work on them.

    Kind regards, nick

     
  • Andrew C
    Andrew C
    2010-03-08

    Hey Nick,

    Using the centering control doesn't cause the instrument to go out of tune with itself or other instruments AFAICS.
    When Center and Pitch are selected, the brighton modwheel works like a pitchbend, but a physical modwheel controller ignores this, just pitching up or down without returning to center pitch (Definatly not a bad thing).

    Ideally, it wouldn't be a bad thing to attempt to seperate the center/pitch into a cc controlled by the pitch-wheel. But I suspect this may be very non-trivial.

    Andrew.

     
  • Nick Copeland
    Nick Copeland
    2010-03-09

    Hi Andrew,

    I see what you mean on the modulation tracking, especially centre pitch. Will review what I can do to either separate them out or if not be selective about mod wheel vs pitch wheel if Centre is selected.

    Regards, nick

     
  • Nick Copeland
    Nick Copeland
    2010-12-12

    The next release will track the PitchWheel. The GUI will not have one but that is not anticpated to be an issue. If pitch is selected in the GUI it will also track ModWheel. Pending.

     
  • Nick Copeland
    Nick Copeland
    2010-12-12

    • status: open --> pending
     
  • Nick Copeland
    Nick Copeland
    2010-12-22

    Closing, will be in next release.

     
  • Nick Copeland
    Nick Copeland
    2010-12-22

    • status: pending --> closed