Online practice for singers
Frequently Asked Questions

This is a common problem with iPhones and iPads: Coria produces no sound, even if other apps and websites do. The reason is usually that the device is in silent mode.

Silent mode is typically controlled on iPhones by a switch on the side. Some iPads also have such a switch. If not, silent mode can be toggled via the Control Center. Look for the bell icon.

There are also a few more obvious causes that apply to all devices:

  • The volume is very low or set to zero
  • A headphone (that you're not wearing) is connected to the device

This is also a problem that mainly occurs on iPhones and iPads. It likely means that the device is locking itself. The screen dims, and the device stops playing. It fully locks a few seconds later.

There are a few things that determine when this happens:

  • First, a setting under Settings / Display & Brightness / Auto-Lock. You can choose a duration here.
  • There's also a setting that determines whether the screen may dim while you're looking at it. If this setting is enabled, the screen will not dim as long as you're regularly looking at it. You can find it under Settings / Face ID & Passcode / Attention-Aware Features. This is enabled by default.
  • The status of your battery. If your battery is nearly empty, the screen may turn off sooner.

All in all: If you’re looking at the screen, this problem shouldn’t occur. But if you’re reading your score during practice, it may be helpful to increase the auto-lock time. If you set it to a very long period (or even turn it off), it's recommended to reset it back after practicing.

Using the screen "Practice your own file", you can open a file to practice. Not all files can be processed by Coria: only MusicXML and Noteworthy Composer (version 2) files are accepted.

MusicXML files usually have the extension .musicxml, .mxl or .xml.
Noteworthy Composer files usually have the extension .nwc or .nwctxt.

There are many programs that can produce MusicXML files. They don’t all do it the same way. In practice, Coria works best with files exported from MuseScore. So, in some cases, it may help to open a file in MuseScore and re-save it—preferably in the format "uncompressed (.musicxml)". MuseScore is a free program that’s easy to install on Windows, Mac, and Linux computers.

Even with MuseScore-generated files, several issues can still cause problems:

  • Files with repeats ("jumps", Da Capo, Al Segno, etc.) may not be processed correctly. It may help to write out the repeats manually. (Unfortunately, this can be a lot of work.)
  • Some complex tuplets cannot be processed. Triplets and duplets are fine, but, for example, a tuplet of seven notes (a septuplet) will cause an error. This can usually be resolved by tweaking the note durations a bit (though it won't be a perfect septuplet).