current ZOG MIXXX setup Jan 2018

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The last post on MIXXX I made is now out of date, so here’s what I’ve been using recently, as since the MIXXX team are releasing .deb files of their nightly builds, I’ve been trying them instead of the self compiled version.

Installed version of MIXXX
mixxx-2.1.0-alpha-pre-master-git6340-release-xenial-amd64.deb
Downloaded from http://downloads.mixxx.org/builds/master/release/

ZOG DJ rig with DDJ SB2

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Native Instruments Audio2 DJ interface and Linux 4 channel alsa config

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I was recently given a Native Instruments Audio2 DJ interface, this is a great little card with working Linux drivers that works well with MIXXX using a variation of the .asoundrc available on the MIXXX site and other locations.

But either my version of the card, or the Linux driver has changed, as my card identifies differently so the config files available elsewhere don’t work with my OS (Xubuntu 14.04 with kernel 4.2.0-18-lowlatency).

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multiple audio outputs for cue with Mixvibes CrossDJ with Android Marshmallow

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TLDR: If you can’t get multichannel USB audio working with CrossDJ on Android 6+, editing the /system/etc/audio_policy.conf file might help, if your device is rooted, and you don’t care about your warranty.

read on for how to do it, if you are comfortable with Linux shell commands and throwing your warranty to the wind. This is an updated version of a post I made to the Mixvibes support forum that they got a bit nervous about and locked…
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MIXXX DJ software – ZOG preferred build

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I’m just documenting this here for reference, and perhaps others find this useful.

  • MIXXX is my preferred DJ software, it works well with the Numark Mixtrack Pro interface
  • One reason to go the digital DJ route is to maximise sound quality, this means FLAC files where possible, CD rips or purchased as wav from beatport, bleep.com or bandcamp.. and 320k mp3 when FLAC files are simply not available..
  • But I found the MIXXX 2.0 series (or earlier) had issues decoding some valid flac files purchased from bandcamp.com, causing sound to abruptly cut out, while MIXXX appears to continue playing
  • after discussing with the incredibly helpful MIXXX developers they pointed me to the MIXXX 2.1 alpha source code available on github, which uses a new audio decoding engine.
  • This fixed all my issues and has proven to be very stable. The effects I have found not that great, but I don’t use them much, sticking to relatively straight forward mixing.

So here are the steps….
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Roland SH-101 T1 Terminated!

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Found a broken Roland SH-101 on Gumtree. Couldn’t believe my luck!
I was hoping for a simple fix, maybe a dodgy power switch or something. When I started to investigate it soon became apparent that someone had been there before me. The T1 transformer, which does DC-DC conversion from the 9VDC plug pack to the various analogue stages was missing! Also, the surrounding components had been lifted out of there solder pads. This wasn’t going to be a quick fix!

T1 Terminated!

Searching around the net and it was becoming obvious that this problem was fairly common but with no one having fixed it! Also, the T1 transformer is not available for purchase anywhere. Continue reading →