3649 - denied
Indeed, that is pretty darn ahead of the curve. You were the Charanjit Singh of circuit bending!
3648 - Request
3647 - feature
I have recorded myself (male voice) saying this and it will be up on freesound soon. Hope I help.
3642 - ranger
3640 - Plutonium
Sounds like you were quite the pioneer in your youth
I spent a lot of time circuit-bending toys in the past; it was wonderful.
You sure you don't want to wait for windows 10? It's most likely going to get released this year, and owners of windows 8 get a free upgrade. If you downgrade to win7, you may not be eligible for it (but you could of course install win 8 later using the key found at the bottom of your computer and the install 10 again, but that's just more hassle).
3639 - Platinum
When I was a boy I unscrewed old calculators (the ones with tube not lcd). Then I took a mono earphone striped the cords and soldered metal sticks at the ends (I hope this makes sense in English…). Then, when holding these metal sticks at different places on the circuit board, and pushing the buttons, you could hear strange noises. Early ambient/experimental exploration…
IT used to be a driver problem.. i think
Recorder specs say
Mic in -33dBu
Line +2 dBu
I think using line is the best.
1 Pre set output mixer limit on +4 dB
2 sent 0dB testsignal from mixer to recorder
3 level mixer input on -10dB
Thats good and safe
i tested MixPre XLR to balanced inputs in Echo Audiofire - yep, the spectre is better than unbalanced and it has less micro interference lines but those inputs in this sound card are too hot and can't be dimmed (i got about -6 or 0, depending of sound card input setting, in meters from Mixpre test signal)
few hours ago with same method i compared mics self noise vs Mixpre self noise vs edirol line/mic input self noise, and must say mics noise in quiet night room under the blankets and pillows about 2 times louder than Mixpre itself and the mixpre louder than recorder input itself
also looks like the mic-in self noise in edirol is a little less noisy than line in. but in real world i can't see the spectre difference between edirol line-in with mixpre potentiometer 3 o'clock vs edirol mic-in with mixpre potentiometer 12 o'clock. still need to know is it technically safe to lower the volume on edirol and use its mic-in.
I think the main noise problem is simple.
The mics should be in the xlr input and powering from premix, but i guess you do already. The self-noise of your mics are like mine. So that is okey. The premix is a great mixer with low self-noise.
The the problem is the recorder i think. Try to find someone with a recorder with a balanced xlr inputs. So you can use the balances xlr output of the premix.
I use this gear chain: Rode NT4 > Sound Devices 302 >Tascam dr-100 Mk2.
In the beginning i did use a unballanced recorder (Sony pcm d50) and the tape out of the mixer. That was more noisy.
For results search , Tascam 302 klankbeeld field-recording
on freesound to listen to my Results.
Some time ago i made a portable set for field recording. 2xOktava MK-012 + MixPre + EDIROL R-09HR. I always set R-09HR to volume 40 (default) and use MixPre Tape Out, but as so Oktava mics are rather quiet i need to keep MixPre potentiometers somewhere between 12 and 3 o'clock. But at this levels i begin to hear MixPre self noise. In this setup the MixPre 1kHz noise signal gives me -20 at the R-09HR meters. Despite the fact that this setup is recommended by SoundDevices its seems not perfect.
Also i experiment with MixPre XLR out to stereo mini jack connector. It outputs louder signal and i got -12 at the R-09HR meter. Its better, but this setup appears bulky in some run&gun; situations.
I also i try to connect a MixPre Tape Out to R-09HR Mic In and i got a -6 R-09HR meters from the MixPre 1kHz noise signal. Not too loud as for mic in.
Next i try lower the input volume to get my lovely -12 at the R-09HR meter and it sounds pretty nice.
I know that usually it is bad idea to use mic-in instead of line-in I decide make some tests and got pretty interesting results. Also i remember R-09HR uses Wolfson WM8786 A/D chip and it was some discussion about its specific line and mic inputs, but can't find it now.
Here is how i do the tests. first 5 seconds is MixPre 1kHz noise signal, then every 5 seconds i turn the MixPre potentiometer to the one mark more and more. Then I repeat this for various recording setups and volume settings. And at last i normalize all recorded files to level 0 to see things more clear. Additionally i made 2 records with Echo Audiofire 4 sound card. Spectrogram images generated in Izotope RX.
From this tests:
From this tests it looks that EDIROL line in and mic in are almost equal
EDIROL line in appears way noisy after normalization boost compare to same level of Echo Audiofire 4.
There is no any visible quality difference in MixPre XLR out and Tape Out
I'm not too technical sound geek but I got 2 fundamental questions here:
1. Is it safe in this situation to use mic-in with lower recorder volume or it can cause other kind of distortion or dynamic range loss which can't be seen in this test?
2. Is it safe to lower recorder input volume without quality and dynamic range loss?
here is also some specs from product manuals:
EDIROL Input Impedance Mic input:
30 k ohms
Line input: 15 k ohms
XLR-Line: active-balanced, 120 ohm output impedance
Tape (3.5 mm) -10 dB Unbalanced, 2.1k ohm output impedance
p.s. i done one more test: MixPre Tape Out to EDIROL R-09HR line in with volume boosted to 55 to got -12 levels meter. And after normalization there is way more noise than mic-in with same -12 levels meter! will post images later...
3638 - Enzyme