[Peter Larsen[_3_]]

On 24-01-2018 21:30, Gareth Magennis wrote:

Moved to a new venue with a Midas M32R.
Recorded the show to USB stick.

WAV's have finite size limits, I am used to dealing with more than 1
sequential 4Gb WAV's recorded on my laptop, and stitching them together in
post with no lost data.

The Midas M32R I used this weekend produced multiple 2Gb WAV's to USB
stick, but lost data in the transitions.
Maybe half a second or so each transistion, dunno yet.

There is a very purist version of the .wav format that cautiously only
allows 2 gigabyte files. It is also very old. Not allowing 4 gigabyte
wave files (less a wee bit for caution) has been "legacy" for all of
this millenium.

Clearly this is not fit for purpose, you can't get that data back.

Twice incompetent in fact. It is a known pestilence with some video
recorders, all those I own, that they end each segment to card, mostly
also 2 gigabytes, sometimes 4 gigabytes, can't remember which does
which, with an empty data block in the audio file. So a parallel audio
recording is already for that reason unavoidable. Strangely there is no
issue of any kind with getting the video contigous when files are
assembled, so perhaps they just do not even bother trying to solve the
problem.

Anyone have any experience of this?

The real issue behind the file splitting is the use of FAT32 on the SD
(& similar) cards because it is a minimum cpu overhead filesystem.
Either the recorders need more brains or - perhaps better, as this is
also a latency issue - an entirely new filesystem for cards & similar is
long overdue.

Gareth.

Kind regards

Peter Larsen