recording cv to tape

Dieses Thema im Forum "Analog" wurde erstellt von ocp, 11. Juli 2006.

  1. ocp

    ocp Tach

    Does anyone know what kind of recorder I should use to record controlled voltages to tape?
     
  2. Jörg

    Jörg |

  3. ocp

    ocp Tach

    Yes. I've tried it with a 4 track k7 recorder some time ago.
    However, I know it is possible with the right equipment.
    I read Morton Subotnick and others have done it and was curious about it.
     
  4. Jörg

    Jörg |

    Perhaps you would need a recorder that is able to handle +/- 5V?
    If such a thing exists. :dunno:

    Anyway, it´s a cool idea! :)
     
  5. comboy

    comboy Tach

    or you need some kind of amp

    cv -> tape reduce the amplitude of the signal to tape level
    tape -> cv amplify the voltage by the same factor like you reduced before

    should work, but i think it will add some noise to the cv

    so long,
    julian
     
  6. Jörg

    Jörg |

    Yes, but do you think a "normal" VCA will be sufficient for this?
    A nice field for some research. :)
     
  7. Anonymous

    Anonymous Guest

    Control Voltages start from DC (0Hz), a tape recoder starts at some 10Hz.
    Professional recoders for measurement purpose use FM to record such signals.
    So without some sort of transformation it is not possible to record CVs on Tape.
     
  8. ocp

    ocp Tach

  9. haesslich

    haesslich Tach

    seems to be a datalogger for pc.
    these are used to measure and log (electronic) data on a computer. and i guess that the 10bit ADC may not be sufficient for real modular specialists ;-) though i think that measuring equipment usualle must be very precise.
    you need something that logs data on tape?
     
  10. Anonymous

    Anonymous Guest

    When I read 'data logger' Teac comes in my mind... ( http://www.teac.com/drindex.html ) ... they will do fine, but maybe they are a little pricey.

    The Dateq box is just a recorder - no playback. It collects 240 samples/second which is about one sample every 4 millisecond.
     
  11. Ilanode

    Ilanode Tach

    Never have given it a try but the following should work without any special tape:
    Feed the CV in question into the VC In of a VCA, an audio signal into the audio in. Record the result on any tape. Play it back through an Envelope Follower to extract the envelope (= original CV). This should work with an average modular synth at least. Even though it probably won't do the job to controll the pitch of a VCO.
     
  12. Moogulator

    Moogulator Admin

    you CAN do this, but you def'ly need a converter (since audio is not loud enough), but I doubt it will be exact enough..?
     
  13. Ilanode

    Ilanode Tach

    Proably my outlay was kind of unclear: A tape has an pre-amp (= rec. level) while the audio out of the tape is too low for a synth you're going to raise the output to the level needed by using the Env. Follower. At least any of those I'm familiar with could do this. However, I agree it will be not exact enough for a tonal pitch control. Nevertheless it should work for unpretencious VC for VCFs and VCAs. For atonal music/noise it might be still an intersting way to go anyway.
     
  14. ocp

    ocp Tach

    I used a minidisc to record the output of a LFO and it works. However, the CV value is not precise.
    I'll keep experimenting...
     

Diese Seite empfehlen