If that doesn't do it for you.....sell everything you own and get some DPA 4011s, a Grace preamp and a Sound Devices recorder. Then you'll be happy!
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Yeah, and then I will start becoming like you guys!
You make a lot of excellent points and have given me some good ideas, as well as validate some of what I thought already. Thank you.
To be clear, though, I'm not interested in sound quality recording for my students. I want to have sound quality to record demos of myself, to also perhaps put clips on a future webpage, or maybe even use to make a cd of trumpet and piano, or brass quintet. The M10 could be a really nice teaching tool, though, because while a kid is playing I could whip it out, record him while still holding it in my hand, and then play it back for him quickly. For those of you who don't realize, quite often with kids I'll tell them something in a lesson and they don't believe me. For instance, things like "you're flat/sharp", "you're rushing here", etc. When I record them and play it back, then they finally figure out why I'm saying what I'm saying. I rarely use a recorder in lessons, but the M10 could be an effective tool to diagnose problems, especially with the ability to slow things down on playback.
I guess in all of these posts I was/am really trying to find somebody (hopefully a like-minded trumpet player) that has been down this road to tell me what they think the best setup will be before I spend a bunch of money trying to figure it out all on my own.