Automatic band equalizer on a recording channel

Started by Jcl,

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Jcl


 Hello. I was wondering if it'd be possible with Bass to add a parametric equalizer to a recording channel automatically (like you'd usually do to a playing channel using DX8 parametric eq). I was just going to code the band equalizer myself, but thought it might already be done. For what I read on bass documentation, DSP or DirectSound FX processing is only allowed on HMUSIC and HSTREAM but not on RECORDCHAN.

 Any info or something that might guide me around?

Jcl

#2

 Yes, but you need a decoding channel for that. I don't want to play the modified stream at all, what I need to do is having the FFT and wave data from the modified channel. In case I use a decoding stream, I can't get the output data after the effects, can I? I don't really need (or want) to store the data at all. Just modify the incoming wave and get appropiate results.

 Can I create a decoding channel, pass the recorded data (on the recordproc) to it, apply the effects, then do a ChannelGetData on the stream after the effects are applied? I could use this (if it's supported on decoding channels), but still see that as a pretty weird solution. Should I go this way?

 Thank you Ian :-)

Jcl

#3
By the way, I was going to implement the band-eq myself (it doesn't really need to be perfect, it's just modifying plugins), so if this would be that much complicated, I'll probably prefer just to make a quick pass over the recorded data with precalculated multipliers.

What would really be nifty for this is having floating point recording channels... perhaps for 1.9? :evil:

Ian @ un4seen

#4
QuoteCan I create a decoding channel, pass the recorded data (on the recordproc) to it, apply the effects, then do a ChannelGetData on the stream after the effects are applied? I could use this (if it's supported on decoding channels), but still see that as a pretty weird solution. Should I go this way?
Yes, see the code in that thread. You don't play the custom decoding stream - you just pass the recorded sample data through it. The FX/DSP are all applied in-place, so it's very efficient (just like applying FX/DSP directly to RECORDCHAN), even if it does seem "pretty weird" :D

QuoteWhat would really be nifty for this is having floating point recording channels... perhaps for 1.9? :evil:
You can do floating-point recording in 1.8 :)
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