Hope someone can help. My Zoom H2 stops recording sometimes, not always, after about 40 minutes during a 60 minute wedding ceremony. The power is still on when I get to the Zoom, the recording is there, and the batteries are good for another three hours at least.
I've checked that 'auto record' is set to 'off' in the menu. The settings are set for two channel record at max quality wav at 48kHz/16 bit. The card is an SDHC 8gb card.
This is a mystery for me as obviously I can't be recording weddings and have this happen.
Any ideas would be welcome.Thanks.

Have you tried another card?

Hi Noa, I'm running a test right now but will try another card straight after..that's a good idea.
I didn't mention in the first post that the file was at 695 mb when it cut so not a file size limit being reached.

That's the first that came to mind, you have to rule out any factors which might cause issues, it could be the batteries, a wrong menu setting but the card is a factor as well to consider.

Do you just offload from the card and ”never” format the card? That may be small parts of old files on the card that causing problem if you don’t format the card.

Markus, I always format the card and reset the menu.The audio file was 16/48kHz on the day.

I'm running a test right now with the same card and it is still recording at 1hr 25 mins on the same 16/48kHz setting. I can't explain it.

At the wedding, the H2 was sitting on a ledge recording away, no one touched it from the video footage I've checked and as I say, the batteries were good....they did record later at the reception for another two hours.

Wish I knew!

Why record at 48khz? for a wedding ........ 44.1khz is good enough for everything except the highest of quality music.
Many of these small recorders are comfortable at 44.1 or lower, but 48 is pushing it.... What 'class' card are you using? I won't touch anything less than class 10 for critical live recordings.

Why record at 48khz? for a wedding ........ 44.1khz is good enough for everything except the highest of quality music.
Many of these small recorders are comfortable at 44.1 or lower, but 48 is pushing it.... What 'class' card are you using? I won't touch anything less than class 10 for critical live recordings.
The audio sample rate for video is always 48kHz. Recording double system audio at 44.1kHz means you have to sample-rate convert during post prior to syncing the audio file to the video, just one more thing that can go wrong and mess up your sync.

Some NLEs (like Vegas Pro) can work with different sampling rates and bit depths, even on the same track.
That said, I would use 48kHz just the same if it's to be used for video.

Just to cover a few silly possibilities:

1.) Does the recorder have an IR remote control? (It does not, as far as I can ascertain... but can you confirm that?)

2.) Did the recording stop during a period with very low levels? Is there any chance you had the "auto stop" function enabled? (Since you say "Auto Record" is off, I think that implies that "Auto Stop" will be off, also.

3.) Did the display say "Data Write Error" when you went back to the recorder? If so, that identifies the source of your problem. I would guess, conversely, that if it did NOT say this, then you did NOT have a data write error, so the card is probably fast enough. But OTOH, different cards have different internal geometry, and your glitch might be occuring at some transition point in the memory addressing, or some other obscure issue.

I concur with an earlier suggestion: when in doubt, get a faster card (and be sure to format it in the recorder itself).

The card is a class ten SanDisk so yes, it is fast enough. There was nothing set in the menu that would turn it off and no IR remote. as mentioned, I did a test yesterday where it recorded till
it filled the card, the same card that had the issue. On the day, the Zoom
no error message, just the usual "Goodbye, see you" that you get when it's ready to turn off...it just stopped recording.

Chris,

It sounds as if you've done a very thorough job of thinking this through, and you've elminated all the logical suspects. That leaves perhaps a few low-probability things to pursue.

1.) Could there be some bug in the firmware? Would it be worthwhile to contact the manufacturer, and see if perhaps there's a firmware upgrade that addresses this?

2.) Although a class 10 card should be plenty fast, perhaps the card is exhibiting some intermittant problem. At one point I think you said you were going to try another card... have you done so?

3.) Do you leave the card in the machine all (most) of the time? Many years ago, I had a recorder that had very small internal memory, and used SD cards for expansion. I left an SD card in it all the time (since the internal memory was small). At some point it became intermittant. I noticed that wiggling the card seemed to help. I concluded that the recorder's contacts were somehow inadequate: either the plating was bad, or the spring tension was insufficient. It seemed that they suffered from metal fatigue if I left the card inserted all the time.

I removed the card, applied some Cramolin to the card's gold contact pads, slid it in and out a few times (to help clean the recorder's contacts), and it seemed to work OK. Thereafter, I left the card out except while I was recording, on the assumption that the contacts would retain more of their spring pressure this way.

I know that's a long shot, but since you've explored all the logical possibilities.....

Good luck with it, intermittant problems can be a real PITA!

My original H4 actually didn't like "faster" cards, and would randomly stop recording with them when I first got it. After that initial problem I've never had any trouble using plain, non-speed or class marked cards in that unit and it still works fine. I've never tried 4-channel recording with it, just 2-channel.