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preenfm2 and preenfm3 / Re: [Resolved] My first preenFM2 metal case .. trouble shooting no audio
« on: October 17, 2015, 07:17:25 PM »
Looks just like one of my grey beard hairs 
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preenfm2 and preenfm3 / Re: [Resolved] My first preenFM2 metal case .. trouble shooting no audio
« on: October 17, 2015, 04:57:28 PM »
Xavier, wow, that is really great! I'll send the board and parts back to you as well :>)
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 09, 2015, 11:54:52 PM »
Xavier,
The preenFM2 PCB has been shipped and is on the way to you
The preenFM2 PCB has been shipped and is on the way to you
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 08, 2015, 11:14:54 AM »
ps ... middle of the night here ... time to rest while not driving 70
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 08, 2015, 11:13:11 AM »
that can be done ... just returned from a seattle noise show ... i ended up playing as a last minute fill in ... great fun
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 05, 2015, 11:51:28 PM »
I did ... a great deal of the first rounds of tests were done with a known to be good 9v power supply. The audible pops have always shown up on boot or with midi coming in ...
Good night Xavier sleep well .. thank you again for your time and tutelage
Good night Xavier sleep well .. thank you again for your time and tutelage
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 05, 2015, 11:31:30 PM »
I read both just now ... the 115k positions read 103.8k ... and the 1.8k positions read 1.788k
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 05, 2015, 11:25:32 PM »
I am quite dyslexic and color blind (short list), but I will definitely check again right now.
Here is some video of part of the test too: https://youtu.be/JXA-8qQG5RE
Here is some video of part of the test too: https://youtu.be/JXA-8qQG5RE
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 05, 2015, 10:27:47 PM »
audio from chime for comparison
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 05, 2015, 10:27:12 PM »
Here is some audio from an MFB Step64 sequencer playing the preenFM2 over midi DIN ... I traced the audio path with the oscilloscope all the way to the phone jacks and recorded this audio sample at the same time. Also, the leds flash on the preenFM2 as midi is received, I reset to the default instrument on the preenFM2 as instructed. The audible pops are in a different pattern (matching notes from the sequencer pattern), but similar to what the chime on boot sounds like in terms of final audio product. There are some "extra" artifacts that blast occasionally that are not native to Audacity with no signal input during a recording (tried this to make sure it was not a ghost in the machine saying hello :>) ... Sorry for the harsh noise! Please make sure and turn your audio output down before playing the files.
The signal as read by the oscilloscope appears all the way to the phone jacks, but it is obviously not the audio we are hoping for. The 3.8v at the DAC output and the 4.02v at the 68 ohm resistors are still the strongest indicators of the underlying problem I think.
The signal as read by the oscilloscope appears all the way to the phone jacks, but it is obviously not the audio we are hoping for. The 3.8v at the DAC output and the 4.02v at the 68 ohm resistors are still the strongest indicators of the underlying problem I think.
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 05, 2015, 12:38:36 PM »
I'll give this a try
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 04, 2015, 11:29:48 PM »
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 04, 2015, 11:29:21 PM »
...
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 04, 2015, 11:14:20 PM »
Ahh, I see .. thanks
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preenfm2 and preenfm3 / Re: My first preenFM2 metal case built from kit #1 of 3 .. trouble shooting no audio
« on: October 04, 2015, 11:08:49 PM »
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