USB Audio
Set up and manage stereo recording and playback to a USB key. Tracks and space available are shown.
Playing back a stereo track from USB key
Playback format - The GLD can play back stereo WAV or FLAC files at 44.1 or 48kHz.
To assign USB playback to an Input Channel – Patch USB Playback to input channels using the I/O / Surface screen or the channel Preamp screen. Touch the Assign button to take you directly to the I/O screen. USB playback is assigned to CH 47/48 in the factory Template Shows. The USB screen provides a shortcut to the I/O patching.
To select a track to play back - Plug in a USB key with the audio files you wish to play back. Set the OPTIONS in the pull-up. Scroll through the list and touch to highlight a track. Information on the track including file path, size and date is displayed.
To start the playback - Use the transport buttons to Play, Pause, Stop and select Next or Previous track. A blue arrow in the lower toolbar in all screens shows a track is playing.
OPTIONS pull-up window
Open the pull-up to set playback options:
Play Next Track - Single or continuous playback.
Repeat Current Track - Continuously play a single track,
Show All Files – List all audio files in all directories found on the USB
key,
Show Playback Files – List audio files found in the USBPlayback
sub directory only.
Show Recorded Files –List audio files found in the USBRecord
sub directory only.
Recording a stereo track to USB key
Recording format – GLD records WAV files at 48kHz.
Recording time – Memory required = 188KB/sec.
Therefore allow:
• 11.5MB per minute
• 700MB per hour
Maximum recommended recording time for one track = 3 hours.
To assign a recording source – Use the IO / Surface screen. Touch the Assign button to take you directly to this screen. For example, record the main mix, a stereo group, aux or matrix, or two independent mono signals. USB recording is fed from Stereo Matrix 1in the factory Template Shows. The USB screen provides a shortcut to the I/O patching.
Check recording level – Use the stereo meter to check the recording level. If the signal is not present or too low then check that the assigned source send and master controls are turned up.
To start the recording - Touch the Record button. This opens the keypad to name the recording. The default date/time name can be overwritten using the keypad.
Touch Apply to start the recording. The elapsed time and remaining time available on the USB key is shown. A red circle in the status bar in all screens indicates that the GLD is recording to the key.
To stop the recording – Touch the Record button again.
Note You can access the USB Audio page by touching the status bar Play or Record icon while in any screen.
Recording Name – A default date/time name is displayed when you open the keypad to start the recording. Touch Apply to accept this name or enter a different name.
Default name example: 15_Apr_18.23.26.wav
USB Key
Use a USB key that is not partitioned and has sufficient space available. We recommend you format the key before using it for audio recording.
Regularly back up your GLD files and USB data.
Note Although there are two USB ports available on the GLD surface only one USB key may be plugged in and used for data or recording at any time.
USB Folders
The AllenHeathGLD / USBRecord directory is automatically created on your USB key when you start a recording.
The AllenHeathGLD / USBPlayback directory is automatically created when you select the Show Playback Files pull-up option. Or you can create it manually using your computer and add the files you wish to play back.