I don't own an OP-1 yet, but I've been doing research on lav mics since like you, I thought they'd go really well with the OP-1. As far as I understand the input on the OP-1 accepts mono line signals (synths etc) and possibly, since I'm not sure about the gain/impedance specs, could also take a dynamic microphone and maybe an electric guitar. Here some other users could shed some light on this. Anyway, lavalier microphones, like condenser mics, require power to operate, so they won't work with the OP-1. That's why you were able to get sound with the battery powered one. I've been looking for a super portable mic myself and these are the possible solutions I've come across:
- This dynamic lavalier made by Shure.
- Any battery powered lav, like the Rode you mentioned.
- DIY small dynamic diaphragm.
I’m wondering… the internal mic might easily be an electret. Most lav mics are electret and perhaps there’s a way to feed the power of the internal mic to the input socket?? If I had an OP-1 I’d try this option.
I’ve checked your mic. It’s made for mobile devices which have a TRRS socket (Left, Right, Common ground, Mic). The mic’s signal travels on the last two parts of the plug, at the very base. If the input on the OP-1 is a standard TRS or TS, it won’t read the third ring.
I just realised maybe IOS has a mic option and it seems like it does!
I also use the Zoom h1, but ya, if you’re looking for something real scaled down, you might have some luck with a video camera mic like Sony’s ECM line. I’ve had some decent results, but there more around the lines of lo-fi to me.
Any updates on a worthy microphone? I must confess I am also just using the one on my phone, so they quality leaves much to be desired.