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Loopy Pro: Troubleshooting Audio Connections

As of iOS/iPadOS 17.5, the OS itself manages the connection to audio interfaces and apps have little influence. In most cases, when there are problems with an audio device connection the issue is system-wide and out of the control of individual apps.

The information in this article is intended to help you get connected.

Note: Logic Pro on iPadOS has access to non-public APIs and offers connection choices when multiple interfaces are connected that other apps do not have.

The way that iOS/iPadOS works, there can be only one audio input and one audio output device at a time. The OS automatically makes the last connected device the designated input and/or output device. If a device is input only or output only, it will take over whichever function it provides. Headphones with mics are input+output devices as far as the OS is concerned. Headphone dongles – even if no headphones are attached MAY look to the OS like an output device. Some USB hubs have built-in headphone ports. These may or may not conflict with an audio interface unless the interface is connected after the system has booted.

Bluetooth Note: if your interface is something like a SparkGo that can connect via USB or Bluetooth, use USB. Bluetooth audio (not MIDI) connections generally have too much latency for realtime music performance. Besides the latency, such devices may perform unpredictably with Loopy Pro when running in Bluetooth mode.

First Troubleshooting

Preparation

These steps may seem superfluous, but rebooting and reconnecting solves a surprisingly large number of issues.

As a test project, we highly recommend that you use Loopy Pro's default project with no plugins loaded in order to ensure that there aren't complicating factors.

Checking the available output devices

Use the system's Control Center to see what output devices the OS sees. The details may vary slightly on some versions of the OS. If these don't work, find out how to display Control Center on your device by searching on the web.

If your device does not appear in the list, see the Common Issues section below.

If your device does appear:

If you don't hear the audio:

If audio still does not work, launch Apple's Music app and see if the audio plays back correctly.

If you have any other audio apps or hosts, check to see if output from them works. When you contact us (see below), let us know whether you tried other apps and if they did or did not work. Please let us know the app names.

If the audio plays back correctly from Apple Music but not Loopy Pro, send diagnostics to Loopy Pro support by following the directions here. Also, send us any screenshots made during the troubleshooting procedure as well as information about your audio interface and any other connected peripherals.

When you have finished this procedure: if this did not solve your problem, send the following information to support at atastypixel.com:

Common Issues

The most common issues are:

Volume calibration project. This Test Tool can be useful in calibrating the output of your iPad or iPhone. It has two loops that send maximum or near maximum volume. Turn down your amplifier or mixer before playing the output as the project's files are potentially loud.