Forums > MaxMSP

Reverb filter – no output?

January 2, 2011 | 1:16 pm

hey guys… please could you take a quick look at this.. the audio is going in and not coming through the filter? have a put something wrong in? or maybe one of the settings?


– Pasted Max Patch, click to expand. –
January 2, 2011 | 1:40 pm

The feedback loop you imposed is the problem. What do you wish to achieve by doing this? There already is a feedback loop (from the [tapout~]s); filters can ‘blow-up’ (going into self-oscillation if the feedback scalar >= 1. I think), so that may have been the problem.

January 2, 2011 | 1:42 pm

the signal cord from your last *~ 0.5 going back into the top onepole~ might be causing a signal loop. you can’t do this. for feedback you’d need send~ and receive~, or you can do direct feedback via tapin~ and tapout~ (the ouput of tapout~ *can* go back into tapin~ as it creates a delay).

yep, tried just playing a file via sfplay~ directly to the DAC. The signal came out into the meter but there was no sound. I deleted the signal-loop patch cord described above, bingo, sound. So a signal loop will deactivate all audio in the patch, not just the signal involved in the loop. interesting. (the sfplay~ help file played the file no problem while the loop was still there.)

I like the effect the patch makes, by the way :) will be cool with the Wii input. Would also like to mess with it using TouchOSC.

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