booming bass/sub bass

Well it is a sine wave, no less. There isn't much to it.

It sounds like you have done the groundwork, pitch bend, etc. Now you'll just have to tweak the timing, decay and release. Of course, find the pitch envelope that fits too. Another trick is using the LFO to modulate that.

I'd spend more time on making a perfect patch, but really, is it necessary? Changing the filter cutoff/resonance on a sine wave isn't going to do much more than 'EQ' it out; there are no harmonics.

i'd rather use tiangle or saw and with pretty closed filter and some resonance, or sine wave with little distortion.... this is a pretty basic patch......

@I AM - Yeah, it does sound better with something more complex than a sine for the self-oscillating filter approach. A TVF can't really do anything interesting to a pure sine wave because it's just a single frequency.

My current approach is to try to figure out just exactly what the relationship is between the 0-127 cutoff values, 0-127 TVF levels, TVF depth, and actual frequency values. It would be nice if the manual gave precise definitions of what these values actually mean in terms of frequency, but it doesn't (or at least I haven't been able to find this info). I guess Roland thinks customers would be scared away if the manual had any mathematics in it.

I've done some experiments setting tone to DC, resonance to 127; playing around with the TVF level, TVF depth, and cutoff; and then mixing down and using the sample editing screen as an oscilloscope to figure out what frequency the filter resonated at. Thus far, I've found that with TVF depth set to +63 (max), a TVF level of 127 gives you resonance at 11 kHz (which is 1/4 of the sampling rate) no matter what the cutoff value is set to. At this same TVF depth, a TVF level of 0 gives you different resonance frequencies depending on the cutoff value. The relationship between filter resonance frequency and cutoff is logarithmic ranging from 4.95 Hz at a cutoff of 0 up to 11 kHz at a cutoff of 127.

Edit: Just to be a little more clear, what I mean by "The relationship between filter resonance frequency and cutoff is logarithmic" is that the cutoff value is linearly related to the logarithm of frequency.

lawndart,

The primary waveforms for a sub bass is ` Oscillator 1 ~ Sawtooth W/F / ` Oscillator 2 ~ Square W/F.
Even though the Square wave is in use, you can bend the curve so it doesn't cut straight off, if you want a touch of release. Don't waste time with LFO in your case, if you want the straight sound edge along the spectrum.

Toggle more with 'Envelope depth - Range of the sound with fine tuning (this will add height or depth to the sound) - Main filtering envelopes ` (Decrease cut off, to get the dullness effect) and also have LPF selected, in the main filtering window.

The rest is by your ear.

I think I have something passably decent now. Still need to tweak it some to get exactly what I want, but it's getting closer now. Thanks, everybody!