Some thoughts on recent posts here:
1. I agree that Tom's abrupt "I'm outta here" was premature, and I have PM'd him politely asking for him to return, letting him know that his exit makes it seem that he was not interested in exploring alternative solutions / explanations to the problems users are seeing.
2. Could some of the ire directed at Tom's responses be a result of pent-up frustration over past bad experiences with Tascam customer / tech support? I can certainly relate - I still can't get any sort of reply from their official email contacts, but I have tried not to take it out on a rep that appears in an online forum. Tom was the one positive face of Tascam customer support I have dealt with, which is why I was trying to keep the peace.
3. While those who are having problems understandably don't want to throw more money at the situation, the fact remains that there is a recommended media list plus a few other cards that Tom posted here recently. To my knowledge, no one has yet reported a problem using one of those cards. Unless and until that happens, you really have little ammunition against the "lazy" or "stock" response of "use the cards on the list".
4. Several people have said it before, but unless you bought cards at an absolutely reputable retailer then you don't really know if you got what you paid for. Most know to avoid eBay, but I won't buy memory cards on Amazon either, as there are many fakes that are hard to spot. If the 70D is more "picky" about cards than other recorders, one of these rebrands might be showing its true colors here even if it works fine in another recorder. The write buffer and how it may be smaller than other multichannel recorders may be significant here.
5. Along those lines, I don't think it's very useful to keep stating that "X card worked great in X recorder but not in the 70D." Some things are compatible with some things, while not with other things. Rehashing this point does nothing to help us towards finding a solution.
6. It will be interesting if Pohaku gets any responses in the GS thread he started. I'm especially interested to hear from Jim Williams in particular, as he has been beating the drum for the 70D loudly and often anytime the subject of recommended recorders comes up. As he said, there have been no complaints there, and I've seen none on JWSound either (but this recorder is probably too low-rent for those guys to see much use there).
7. The idea of testing a possible transfer issue seems to be worth pursuing. I have found with my unit that it is somewhat picky about USB cables - the heavy Monoprice cables with the ferrite cores drop the connection for me mid-transfer, but other cheaper cables work solidly 100% of the time. When I have had a cable drop the connection, it never caused any problems with the files - the files simply didn't transfer, and I changed the cable and all was well.
If Snowman or anyone else wants to test transfer errors, I would suggest:
- Listen to files pre-transfer to confirm presence / lack of errors on original file.
- Transfer via recorder (card still inserted).
- Transfer a second copy via card reader (card removed).
- If any errors pop up post-transfer, try the above again with a different USB cable or card reader.
- If any previously-good files (played back fine on recorder) developed errors after transfer, did those same errors then appear on the original file on card itself? The curse rebounded...
- Tell us what operating system you're running.