Brassteacher wrote:antto wrote:i already have raw recordings from my VCO, but more are welcome
btw, record an "step" signal thru your device if you can, so i can approximate the DC-filter frequency and "undo" it, this way i'll restore the waveforms from the recordings ;]
Just posted some! Not sure if Audacity can do the step signal you are talking about, and I'm not sure what that is anyway . Let me know what it is, and I'll see if I can figure out a way to get it done. I'm afraid I may have to dig up a newer audio interface for my Mac, it's a 6-year-old dual G5. Great machine, but the on-board audio in is a bit limited by newer standards. You may want to check the signal polarity when you download the file, I haven't seen a DAC yet, at any price, that didn't invert the signal on playback, and very few DACs allow you to flip polarity. Either it'll need to be done in software, or through and inverting hardware buffer, or just switch the black and red connections to your speakers .
when recording with a PC, your audio card usually has a DC-filter (usually a 1st order HP filter at some low-ish frequency)
so the recorded waveforms from the x0x will not look right, especially the lower freqs
but there is a way to fix this, a "reverse 1st order HP filter" .. i used this with my own recordings at it works pretty good!
the only thing is: i need to know the exact frequency of your DC-filter, in my card it's around 16Hz
the "step signal" thing:
you could use some square wave for this.. even the x0x DinSync clock or RUN signal would work
record this and it'll be very clear what the frequency of your DC-filter is, because these signals have "flat" portions.. if you use the clock - be sure to use some very slow tempo ;]