Sound leaking through a pad program

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Sound leaking through a pad program

By djst Wed Nov 03, 2021 7:52 pm
I'm running into the weirdest of problem with a pad program where there's a subtle "leakage" of sound regardless of how the overall program is processed.

Example: i put a LP filter on the entire program and turn it down to 50 Hz, but I still hear a lot of higher frequency sounds. Conversely, a HP filter cranked up to 20 kHz and lower sounds are still coming though. This started after about a week ago, it may be related to the 2.10.1 update. Any ideas what's wrong? There are no weird routing like submixes or send fxs active either.

Re: Sound leaking through a pad program

By djst Thu Nov 04, 2021 9:49 am
bilposey wrote:check your send and sub mixes
sound like a problem


Yeah it's really weird. I have no submix routing for this program and no sends, just the insert with the filter (but any insert will reveal the problem). It's like there's a tiny fraction of the audio from this Program only that is somehow leaking through to the master regardless.

Any other ideas? :WTF:
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Re: Sound leaking through a pad program

By jabberwalky Thu Nov 04, 2021 11:47 am
If it's a keygroup program, i've had issues with sometimes not realizing certain KG accidentally had like a tiny bit of SEND. I think it's most likely something like that in the program itself, because it isn't visible on the channel mixer at such low volume.

Re: Sound leaking through a pad program

By djst Thu Nov 04, 2021 12:19 pm
jabberwalky wrote:If it's a keygroup program, i've had issues with sometimes not realizing certain KG accidentally had like a tiny bit of SEND. I think it's most likely something like that in the program itself, because it isn't visible on the channel mixer at such low volume.


It's not a keygroup but the drum program. Even so, if audio were sent to a send fx, it would send the audio processed by the inserts, so in this case, the audio is completely quiet (HP filter set to 20 kHz), yet there is still clear leakage.
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Re: Sound leaking through a pad program

By 83dude Thu Nov 04, 2021 7:16 pm
A filter has a slope, there‘s no 100% filter. Even an 8-pole filter lowers the signal by approx 24 (48?) decibels per octave. This is normal.

For example: https://en.m.wikipedia.org/wiki/Electronic_filter#/media/File%3AElectronic_linear_filters.svg

Could you provide us with an example? A bounced master, maybe?

Re: Sound leaking through a pad program

By djst Thu Nov 04, 2021 11:04 pm
83dude wrote:A filter has a slope, there‘s no 100% filter. Even an 8-pole filter lowers the signal by approx 24 (48?) decibels per octave. This is normal.

For example: https://en.m.wikipedia.org/wiki/Electronic_filter#/media/File%3AElectronic_linear_filters.svg

Could you provide us with an example? A bounced master, maybe?

I figured it out! I had individual pads in the program with sends. Apparently pad sends are sent pre-program inserts on the MPC. Now I know. :roll:

Re: Sound leaking through a pad program

By djst Sat Nov 06, 2021 9:35 am
jabberwalky wrote:This is what I said lol. A KG is the same as a PAD. Glad you sorted it out.


Well you mentioned keygroups so I didn't consider the transferability. Appreciate your help though!
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Re: Sound leaking through a pad program

By hyena Sat Nov 06, 2021 5:25 pm
djst wrote:
83dude wrote:A filter has a slope, there‘s no 100% filter. Even an 8-pole filter lowers the signal by approx 24 (48?) decibels per octave. This is normal.

For example: https://en.m.wikipedia.org/wiki/Electronic_filter#/media/File%3AElectronic_linear_filters.svg

Could you provide us with an example? A bounced master, maybe?

I figured it out! I had individual pads in the program with sends. Apparently pad sends are sent pre-program inserts on the MPC. Now I know. :roll:


yeah, program sends are post program effects, but pad sends are pre program effects, its kinda logical if you think about it, because the individual pads send a copy of their audio to the sends before hitting the bus (program) and its effects. sometimes it can be really annoying, in that case instead of using sends just put your reverb and\or delay on the individual pads and mess with the dry\wet parameter.

Re: Sound leaking through a pad program

By djst Sat Nov 06, 2021 9:42 pm
hyena wrote:yeah, program sends are post program effects, but pad sends are pre program effects, its kinda logical if you think about it, because the individual pads send a copy of their audio to the sends before hitting the bus (program) and its effects. sometimes it can be really annoying, in that case instead of using sends just put your reverb and\or delay on the individual pads and mess with the dry\wet parameter.


You are right, it does make sense now that you explained it to me. And yes, per-pad inserts is the solution here. I normally prefer to route drums to the same send for consistency, but since the MPC doesn't have parallel mix channels, I guess I'll have to do with what it does have. Thanks!
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