If I select this Loopback virtual device as the output in an app, I can send multiple separate channels out of that app at once.
#How to record computer audio loopback Patch
Using the virtual patch cables in Loopback, I can send any audio source to any channel. If I select this card as the input in Audacity (or another DAW like Logic), I can record eight separate tracks at once (see figure 13). Note that the Pass-Thru Source tile now has eight channels as well. However, you may add as many total Output Channels as you need by clicking the + to the right of “Output Channels.” In the image below (see figure 12), I have added six more Output Channels but Loopback currently supports up to sixty four. Up to this point, we have seen that Loopback allows one to add multiple Source tiles and a Pass-Thru to combine and route audio to a single stereo output tile. This will make use of the Pass-Thru and feed the audio directly without needing to add any Source tiles. Loopback is flexible enough to offer more than one solution to these signal flow challenges.
In this case you would make a single Loopback virtual device and set it as the output of one app and the input of the other. Sometimes you want to send audio directly from one app to another. In this case you would add the app as a Source tile.
Sometimes you want to assign your audio interface to the input/output of an app and then also siphon the audio off to a recording app. In some cases an app has no separate audio input/output settings and you must use a Source tile Chrome, for example. Why might you choose to add a Source tile rather than set the output of an app to the Loopback virtual device Pass-Thru? In some cases, it does not matter which approach you use. As with the Sources and Output Channels tiles, you may add as many Monitor tiles as you wish and route whatever outputs you wish to them. If you do end up using a monitor, it looks like figure 10 and follows the same rules regarding virtual cable connections. For simple workflows, I would recommend unchecking mute and leaving the Monitors column empty. There is more than one way to think about this, and it depends on how complex your setup is. If Audacity is capturing the audio, and “mute while capturing” is checked in Loopback, the audio will stop playing back through your speakers or headphones. This means that if you add Chrome as a source and leave it muted in Loopback, you will hear it until you assign that virtual device as an input to another app. Above I mentioned that you have to be careful that Loopback mutes audio Source tiles when capturing by default.
The Monitors column offers you the ability to pass audio flowing in and out of a Loopback virtual device to a specific playback device at the same time. Sound goes into the mic, is amplified by the preamplifier, and is played back on the speaker (see figure 1). The simplest audio routing scheme would be to plug the mic into the preamplifier input, and the speaker into the preamplifier output. Let’s assume that we have a microphone, a microphone preamplifier, and a speaker. Why would we use one? Think about it this way. Most likely, if you are among the many musicians who were forced into teaching and collaborating online due to the pandemic, you have never seen a physical patch bay. In practical terms, this means that audio can be sent between any app or connected physical audio interface in real time. It functions as a virtual audio patch bay. Loopback is a macOS based audio routing application created by Rogue Amoeba ($99). Introduction to Thinking like a Patch Bay Manage a remote multi-track recording session in a DAWĪ note about latency and sampling frequency Use a talkback mic or master monitor device Livstream a low latency performance to Zoom with bidirectional audio
Present a webinar in Zoom with multiple audio sources Record audio that is playing on your computer Introduction to thinking like a patch bay
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