Should I persist with my old microphones or are they simply not going to work? I have two SONY electret condenser mics, 25 years old, ECM737 and ECM909. I have fiddled with everything I can find. I can capture sound with arecord or audacity but with a background level of -25 dB. JACK and Jamulus give me levels nobody can hear and the wisdom on JACK seems to be that there are no controls and ALSA is not going to help anyway!
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Yes, I have understood something (not much) about line-in and mic levels. I have a softvol in ALSA that gave me the result I was so pleased with last week but it hasn't helped with JACK or Jamulus.
The microphone specs don't seem to fit well into the world of line-in and mic. I sort of recall something about SONY microphones being 'different' all those years ago???
Last edit: Robin Rigby 2020-06-06
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I am not the microphone expert, but electret condense mics can loose their polorisation charge with time. It is claimed that "newer" units don't. The question being is 25 years old "newer" ? In any case if that polarisation charge is lost they will not work. That may be the problem.
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Should I persist with my old microphones or are they simply not going to work? I have two SONY electret condenser mics, 25 years old, ECM737 and ECM909. I have fiddled with everything I can find. I can capture sound with arecord or audacity but with a background level of -25 dB. JACK and Jamulus give me levels nobody can hear and the wisdom on JACK seems to be that there are no controls and ALSA is not going to help anyway!
Yes, I have understood something (not much) about line-in and mic levels. I have a softvol in ALSA that gave me the result I was so pleased with last week but it hasn't helped with JACK or Jamulus.
The microphone specs don't seem to fit well into the world of line-in and mic. I sort of recall something about SONY microphones being 'different' all those years ago???
Last edit: Robin Rigby 2020-06-06
I am not the microphone expert, but electret condense mics can loose their polorisation charge with time. It is claimed that "newer" units don't. The question being is 25 years old "newer" ? In any case if that polarisation charge is lost they will not work. That may be the problem.