StreamYard allows you to download individual audio tracks for each participant in your live stream to make post production editing much easier.
What are individual audio tracks?
Every audio source in your broadcast will be recorded as a separate audio file. This includes the audio from your guests, screen shares, local video files, and video clips. The files names are based on your participants/video file names, and include the timestamps where they were located within the broadcast.
Note: Separate audio tracks are only available on the Professional Plan.
How to turn individual audio tracks on?
In the studio, click "Settings." Then check the box to "Record a separate audio file." You must do this prior to going live or recording.
How to download individual audio tracks?
1. After your broadcast ends, in the top right of your studio click "Share", then click "Download Recording." 
2. Under Individual Audio Recordings, click "Download." Each participant's audio will be downloaded as a WAV file, and each video asset's audio will be an MP3 file.
Note: Files are not recorded locally, they are recorded in the cloud.
What do the individual audio file names mean?
The individual audio files are named with a timestamp, and the name of the user/video the audio is for.
The timestamp is in "hour;minute;second;millisecond" format.
For example, "01;48;03;44_Geige.wav" would mean that Geige's audio was added at 1 hour, 48 minutes, 3 seconds, 44 milliseconds into the stream.