Hi there,
There is still a bug with the envelopes on MPC-OS 3.4.2 when using bass-sounds with a long decay (e.g. 808-Kick) .
- Tested on: MPC X SE
When editing the amp-envelope to a shorter decay then the samples length the envelope will add a "hissing" noise and sometimes also pop/cracking sounds when played from midi. The noise will even get stronger when manipulating the curve of the decay phase in the envelope or using filter with lowered cutoff.
This is not an user error as often proclaimed, because the sample will sound fine (no noise etc.) when triggered by the MPC Pads but noise will appear as soon as you use a midi device (in my case a midi-keybord) to trigger the sample-playback or when note-events are played by a sequencer (external or internal sequencer)! You can even make a recording with the MPC Pads. When played the first time (no notes recorded/played for the specific sample yet) the sound is ok .. as soon as the notes are recorded and played back for the first time the noise will appear. I tried every combination of different settings for the 3 envelopes (amp, filter, pitch) and different sample lengths (even with added silence on start/end of the sample and snapping on 0) but the noise still appears. This is clearly a bug and I can't believe that it is still there in 3.4.x!
I will post some of the many other existing bugs here soon, but the envelope bug is by far the most annoying one because it renders the MPC more or less useless for me at the moment (can only use the Drum-Synth which has a "clicking" problems on his own).
Finally I made it. Sorry it took so long but I tried recording only with my cellphone-cam and sound via my monitor-speakers, but that does not worked out because the phones mic could not record the sound proper/clean enough. So I had to make a new setup (with a new mic because my old trashy mic just broke when I plugged it in after a long time just laying around)

And then afterwards I had to find/ download and use a video-editing-tool to get sound and video in sync etc.
But now its finally done. I tried my best to show how the bug appears and to record the noise. I hope you all can hear it too! I strongly recommend to use headphones!
Apologies for the bad camera, my loud breathing

, my bad english and the quality of the video overall (I'm not use to make those descriptive videos)!
All best
gnr-8-or
Maybe an admin can attach the video-link to my original bug-post?! Thx in advance!
DONE