Quick Track Freeze in Hosts to Save CPU

This quick method can be used to freeze a track in a host such as AUM when CPU use is getting too high. This guide is written for AUM, but can be used in any host that supports AUFx.

1. Drop Loopy Pro in as an FX in the track that you want to freeze.
2. App Settings:
   • Audio Sources > Audio Unit Input > Visibility (the Eye icon): ON
   • Host Sync: ON
   • Global Track Settings:
     • Play/Stop Quantization: Record if Empty: ON
     • Loop Audio Threshold Recording: OFF
     • After Recording: PLAY

1. Swipe up on the first loop to get to its settings
2. Scroll to Follow Actions (you may need to touch the down arrow at the bottom of the menu to open up additional settings)
   • Tap Begin Record, then scroll down to Audio Source Actions > Mute / Unmute Audio Source
     • Target: System Audio Input
     • Action: Unmute
     • Tap the Create New Action button
   • Tap Finish Record, then scroll down to Audio Source Actions > Mute / Unmute Audio Source
     • Target: System Audio Input
     • Action: Mute
     • Tap the Create New Action button

• Scroll up to the track Length settings and select the number of bars you want to record.
• Delete all but the first loop. If we want more loops later, we can copy and paste the first loop then clear it. This will save having to make all the above settings for each track.

If all has gone well we now have a single track set to record a looping input source for a set number of bars. Recording should begin when the host starts and end automatically. When recording ends the audio input will be automatically muted and the loop will begin playing. At that point the input app(s) can be disabled or removed. (

• Maximum CPU savings requires removing the input completely.
• For this reason, saving the session so that the channel can be restored later is recommended.

1. With the host transport stopped, tap the track to arm it.
2. Press Play in the host.
3. Recording should start and end automatically after the number of bars set above.