- VCAs need a CV to allow sound to pass through. To split a CV which is to control the Pitch of multiple VCOs you will need a Buffered Multiple. Some modules can be very sensitive to tiny changes in CV or settings, others require quite big changes to get any significant difference in output. CVs and Audio signals can sometimes need attenuation or amplification as a result, and sometimes a DC offset can be necessary to allow CV's/ Audio signals to be used interchangeably.
- Some filters can self-oscillate effectively when certain settings are cranked up high enough, the filter can emit a sound even with no input, generally a relatively loud audio frequency sinewave.
- Buffered Multiples have designated ins/outs - these won't work like a passive multiple. You can't get a signal out of an 'in' or put an in into an 'out' with a Buffered Multiple.
- To split a CV that is to control the Pitch of multiple VCOs you will need a Buffered Multiple. Too many modules drawing from the same pitch source will affect the voltage causing tuning to be off if you use passive multiples or stackables. You can get away with only a few splits with a passive multiple/stackable, sometimes.
- Oscillators send a signal even with no input. Even if there's nothing saying what pitch to play or when to start/stop - that is done by other modules such as sequencers, VCAs etc. This is true for VCOs - they'll make a constant tone and LFOs - they'll make a constant CV (dependent on settings).
- Some modules can be very sensitive to tiny changes in CV or settings, others can require quite big changes to get any significant difference in output. CVs and Audio signals can sometimes need attenuation or amplification as a result, and sometimes a DC offset can be necessary to allow CV's/ Audio signals to be used interchangeably.
- Filters and VCAs can distort when fed a sufficiently loud audio signal. This can be a very god thing - I love to feed the ASys RS-100 LPF and/or RS-180 VCA a really hot signal by putting a cranked up VCA or Filter with lots of Resonance before them in the signal path because they overdrive in a lovely soft, warm fuzzy way.
- Envelope Generators need to be triggered. This is generally done via a Gate signal, but can be a CV from pretty much anything providing enough voltage.
- Most Sample & Hold modules require an external input to sample and output a DC CV signal. At sufficiently high sample rate settings the CV output can be used as an audio source, but generally the output will be either a stepped sequence of CV signals if the sample is a wave or some random/pseudo-random CV singals if the input is noise or a very complex audio source.
- Filters can completely silence a sound. Since on a basic level filters remove frequencies from an audio signal, at certain settings a low pass filter may, for example, take all the high frequencies out of an audio signal that is just treble so nothing remains.
- Audio can come out much louder or quieter than expected sometimes.
- VCAs need a CV to allow sound to pass through. unless there's an offset/initial control set to allow some audio through. In a most basic patch this CV is generally a gate triggered envelope.
- something i have just been alerted to: on doepfers homepage where the standards are laid out theres no mention of pitch cvs. generally pitch cvs are between 0 and +10 V, but not all vcos can respond to/accurately track the full 10V range. This is why most quantisers don't accept -ve CV values!
No comments:
Post a Comment