User Manual

43
7 microSD Record and Play basics
The Aurora
(n)
has a very powerful new feature for a professional audio converter, the inclusion of a microSD
card reader for recording and playback. To support the throughput required for high channel count, high
sample rate recording, a simple limitation was required. The Aurora
(n)
will always record to files that are
contiguous, meaning there can be no gaps in the file structure. This is normally not a consideration as long as
you always record on a freshly formatted microSD card, and NEVER delete any of the files on the microSD
card using a computer. Deleting files would create an empty “gap” in the file structure which might cause the
Aurora
(n)
to do extra work while recording to skip over this gap. This would cause a delay in recording which
would in turn cause an audible glitch in the file, and so deleting files from the microSD card is simply not
supported.
If you wish to free up space on the microSD card, simply copy all of the files you wish to save to your
computer, then format the card. If you wish, you may copy files from the computer back to the microSD card
and this should still result in “no gaps” file system as long as no files are deleted from the microSD card.
Once a file is deleted, you risk creating a gap in the file system and the microSD card will need to be freshly
formatted to ensure glitch-free and error-free operation.
Hiding a session simply moves that session into a new folder called “.HiddenSessions” and does not delete
any files or free up any space on the microSD card. Hiding a take simply moves that take into a new folder
called “.HiddenTakes” and also does not delete any files or free up any space on the microSD card.
The file system for recordings will be:
Root folder / Session # / Take.wav
Each session is stored in its own folder using the session name, and each take is a WAV file within that folder
using both the session name and take name. The take file names will be Session-##.Take-##.wav where the ##
are the session and take numbers. Example:
Session-01
Session-01.Take-01.wav
Session-01.Take-02.wav
Session-02
Session-02.Take-01.wav
Session-02.Take-02.wav
The Band
The Band.Take-01.wav
The Band.Take-02.wav
If you rename a session on the Aurora
(n)
, all of the take files will also be renamed to reflect the new name of
the session.
The Aurora
(n)
supports up to 128 sessions per microSD card and up to 256 takes per session.
As stated earlier in this manual, the Aurora
(n)
always records in 24-bit format. The Aurora
(n)
is able to
playback 16-bit, 24-bit and 32-bit PCM files with 2, 4, 8, 16 and 32 channels. The Aurora
(n)
supports 32-bit
RIFF header wav files as well as 64-bit RF64 header wav files. File names can be any length, but only the
first 16 letters of a filename will appear on the Aurora
(n)
Take Management page. The WAV Take files must
be placed into a Session folder. Session folder names may be any length but only the first 16 letters of the
Session folder name will appear in the Session Management page.