Altered Bass Drum sounds

Discuss Yocto construction and related issues
  • Sounds like the same problem I have..
    Recording: https://soundcloud.com/rvooh/808-bd-gone-wild/s-1cnA4
    - first part: low decay
    - 2nd part: mid decay
    - 3rd part (and only here you hear the problem): high decay

    My friends yocto kinda does the same, but less bad. It also varies with tempo.
    Last edited by rv0 on Feb 15th, '16, 13:25, edited 1 time in total.
    Get the latest unofficial Yocto V1 firmware here.
    Be sure to check the revised manual.
    Leave your comments in this thread.
  • Wish I had some meaningful input for this but I've worked on an 808 with same issue which was not resolved
  • I have the same issue with two separate Yocto's here as well. The bass drum doesn't seem to gate itself. It seems like using even a medium amount of decay causes overlapping bass tones that phase each other. It is very frustrating not having consistent sounding kicks.

    Haven't looked at the BD schematic much yet, I wonder if it could be a bad Germanium diode...Hmmm

    Any tips massively appreciated!
  • After talking to my synth tech, he informed me that the problem can be found on some 808's too, more or less..its a component tolerance thing.

    His suggestion was to play a bit with R164
    Get the latest unofficial Yocto V1 firmware here.
    Be sure to check the revised manual.
    Leave your comments in this thread.
  • ok, i tried playing with r164. but it doesnt seem to help.
  • ok, time to revisit this

    the fact that you get altering bass drum sounds with long decay is completely normal because thats how the circuit works.
    avoid retriggering the BD while it is still decaying.

    R164 is very critical.. I had a 1,5 minute decay on my BD.. I measured R164 and it was close to 46k instead of 47k.
    I replaced it by a 1% resistor of 47k and bam, my decay decreased to less than 5s!
    Get the latest unofficial Yocto V1 firmware here.
    Be sure to check the revised manual.
    Leave your comments in this thread.
  • Here´s an update on the issues of my Yocto.

    The drum machine doctor cleaned the superfluos flux (the lubricant used for the solder) from the surface. This was the reason for some of the strange behaviour.

    Now the bassdrum won´t have no more jumps in volume and a proper decay, which i can dial via the decay knob. That´s at least one issue solved.

    He couldn´t find the reason for the pitch shifts on the bassdrum (and the snare btw, which i found out later), when i turn the tempo knob.

    I will open another topic for this issue.
    Thanks to you all for your help.