Parts Express sells its iMM-6 calibrated Mic for $16.25. But there is a catch. It is designed to be used on iPhones and Android phones, not on a PC. That prevents us from using our favorite PC software with the mic. So, it seems this is a perfect item to hack. That is what this thread is about.
Here are pics of the mic:
From the business end:
Image not available
And a profile:
Image not available
If anyone knows how to use this mic with a PC, please let us know.
I think that to make the best use of this mic requires hacking it. There are issues of course. Here are some. If you have more, please post.
One issue is that the plug is a TRRS (tip, ring, ring, sleeve) plug rather than a TRS (tip, ring, sleeve) plug as used in PC sound cards. So we need a schematic of what is going on inside the mic. I have been unable to find one. Anybody out there got the schematic?
Another issue is whether any phantom power is being delivered to the mic. PE claims it is a condenser mic. If so, power is required. This might be resolved with a schematic. Does anyone know details re: the phantom power issue and how to resolve it with a PC?
Another issue is the shape of the mic. I presume that the capsules are calibrated in their sub-carrier before the sub-carrier is placed in the frame holding the headphone/line out jack. So, the mic will be more closely calibrated with its curve if the jack and its related plastic is removed. Thoughts?
Another issue is whether the calibration curve was measured with 0 deg, 90 deg or 45 deg mic position relative to the sound source. My guess is it was done at 0 deg. Any ideas?
I think this hack would be a fun project and result in an impressive calibrated mic for very little cash.
What do you think?
Here are pics of the mic:
From the business end:
Image not available
And a profile:
Image not available
If anyone knows how to use this mic with a PC, please let us know.
I think that to make the best use of this mic requires hacking it. There are issues of course. Here are some. If you have more, please post.
One issue is that the plug is a TRRS (tip, ring, ring, sleeve) plug rather than a TRS (tip, ring, sleeve) plug as used in PC sound cards. So we need a schematic of what is going on inside the mic. I have been unable to find one. Anybody out there got the schematic?
Another issue is whether any phantom power is being delivered to the mic. PE claims it is a condenser mic. If so, power is required. This might be resolved with a schematic. Does anyone know details re: the phantom power issue and how to resolve it with a PC?
Another issue is the shape of the mic. I presume that the capsules are calibrated in their sub-carrier before the sub-carrier is placed in the frame holding the headphone/line out jack. So, the mic will be more closely calibrated with its curve if the jack and its related plastic is removed. Thoughts?
Another issue is whether the calibration curve was measured with 0 deg, 90 deg or 45 deg mic position relative to the sound source. My guess is it was done at 0 deg. Any ideas?
I think this hack would be a fun project and result in an impressive calibrated mic for very little cash.
What do you think?
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