These audio sources need to be combined via an internal or external mixer or audio interfaces. Broadcast software has an internal mixer, which will need to be handled properly.

Just having a signal showing in the mixer does not necessarily mean its a good audio signal. We need to balance all audio sources to be at a pleasant level.

We are using Open Broadcast Software (OBS) to capture audio and visual sources, mixing them, and to present them to our radio station that passes the stream to the listener.

Broadcast Software

There are a few good packages out there. But the best open source and free software available at this time is OBS. It is an advanced application that is used even by commercial broadcasters such as Infowars.

OBS has just released an update that includes a much improved audio mixer. This handy device now clearly indicates where the healthy audio levels are and which levels one must avoid.

Audio sources as you can see here can be individually leveled, monitored and muted for recording and broadcasting.

But where are the ideal levels? And how do I know what is technically sound (pun intended)?

• Rule Number 1: Always wear headphones when using a mic.
• Rule Number 2: Never allow the audio to get into the hot red zone. It will clip and distort.
• Rule Number 3: Always test before the show. A short 2 minute recording will do the trick and allow you to tweak the mix.
• Rule Number 4: Always test the audio of your co-host, guests and
• Rule Number 5: Always check the audio of new music sources, such as a video.

Testing

Pre-Show

The testing is simple. OBS can record via a simple press of a button. Record your show in MKV format, as it is crash resistant and allows multiple channels per audio source. This is important if you ever wish to extract different audio sources from the recording individually.

Show Tip: REMEMBER TO RECORD
Also remember to record your show that you can re-use it and MSP Waves may rebroadcast during backfill.

Once you test the recorded pre-show audio with all audio elements, including guest and co-host, and after listening you decide that correction is needed, record another two minutes until you're satisfied.

In addition, our operations team can run an audio check with you 30 minutes before your show. But that does not replace the need for your own recording audio check.

The more transmissions you have broadcasted, and not having changed anything, the less likely it is that there will be issues.

Pre-Show-recording testing will give you confidence and puts you in charge. It isn't nice to have to deal with significant audio problems once you're live on-air, because you want to focus on your energy, your audience, and your performance.