Good patches to test SID filters with?

[jjonas]

Hi,

for those of you who know more about the SID, is there a good patch in the preset patches to test whether the SID filters are working properly? I found out recently that the filters of one of my 6581s are not working, i.e. it goes silent when you put the filters on, but works fine as long as they're off. Is it enough to test them with any filter setting, or can there be more subtle and devious faults that can be revealed only by certain settings?

[Hawkeye]

Hi,

I am not aware of different degrees of "possible damage" to a sid filter, but what you can do to validate it, is to just use a lead patch, with e.g. three one-octave detuned ("trn -12, 0, +12") sawtooth oscillators and the filter activated for all three-oscillators... then test the different sid filter modes manually... low-pass, band-pass and high-pass (also combinations) while sweeping the cutoff value... the results should be distinct and easily audible...

Also, you can do a-b-c-d tests with an mb6582 with four enabled engines by just pressing the same key on the keyboard again - it will cycle through the engines and through the four sid pairs, so you can easily hear if they sound differently.

Greets,

Peter

Edited November 7, 2011 by Hawkeye