So, we fixed the Alice mics and they sound amazing. Crazy how much difference one .13 cent part makes. Good eye again, Scott. Now we're on to the omnis and I'm...
Any help would be appreciated for this problem: I got a used Joly-modded Apex 205 (mesh removal, Lundhal transformer, 1.8u ribbon). Upon arrival, I noticed...
There's not a whole lot to many ribbon mics. If you have a working transformer I would hook it up to the leads and see if it powers up from there. A couple...
Also, check if the ribbon isn't touching the magnets. You can check carefully using a multimeter. Probably a stupid question, but you did corrugate the ribbon?...
... I'm not sure I understand the question. If you're asking why the signal of one diaphragm is inverted to produce a figure-8 pattern from a large-diaphragm...
Hi thanks for the replies, To clarify - I am building a 6 capsule ambisonic microphone for my masters here at the sonic arts research facility based on the...
It looks like they're using pressure (omni) capsules and deriving a fig-8 directivity pattern by summing them anti-phase. This is mathematically correct as...
In a nutshell, it's because real figure-8 mics have reversed polarity on the backside. Just think about it a bit - if you've got a diaphragm (originally a...
thanks again - as you can probably tell Im quite new to mic building. Scott if equal force is exerted on both sides the diaphram will not move - if the force...
thanks again - as you can probably tell Im quite new to mic building. Scott if equal force is exerted on both sides the diaphram will not move - if the force...
The force is not identical on both sides, due to different travel path, there is a pressure gradient. As fig-8 capsules being better than a pair of omni, the...
Hi, My first post and I hope I am doing it right. . . . . I just uploaded a file in to the general file area titled "simple 5v mic pre.pdf" I found it on...
Electret microphone needs DC current (in the simplest case it built-in FET drain through a resistor is connected to positive power supply) while dynamic...
If you can find a source for inexpensive, good figure-8 capsules please let us know!!!!! -Scott ... -- ... And you'll visualize not taking any chances But meet...
James' post on a simple 5V preamp prompts me to ask which laptops have good Line Inputs these days. In da old days, IBM T2x and T4x had 3 x 1/8" TRS sockets -...
Hi Far better to use an external soundcard and get the analogue audio away from the electrically noisy environment inside the computer. Every Blessing Tony ...
For starters check what capabilities the laptop under consideration docking station provides. I vaguely remember that some Lenovo laptops have Line In (and 5.1...
My MacBook from 3-4 years ago has a pretty good stereo line input, and no mic input though it does have mics built into the screen. I've recorded music...
Well I have been using two tsb 140a facing opposite each other about 20mm apart - this affects only those frequencies with a wavelength of less than 20mm. So...
When I've done a simulated figure-8 I put the two diaphragms in the same plane - ie one capsule next to the other. The only delay needed for figure-8 is the...
dear scott  there are two versions of this design (i am the culprit) in the second, the capsules pairs are on-axis as you suggest. i plan to build one of...
... Are there ANY laptops currently on the market that have stereo line ins? My HP Pavilion that I bought some six years only has MONO mic in. I was cross...
My Gateway has a stereo in. It's 20 dB worse SNR than any external. I just carry my note-card sized external sound card and use that. The thumb-drive sized...
Hi, This is where I am confused because I really do not understand but really want to. I am assuming that any external sound card will output a line signal...
External soundcards output in digital form (e.g. USB, FireWire), so the laptop power supply noise matters much less and present in the laptop EMI matters even...
Hi, I thought that might be it. There is really no way around the noise I am encountering via analog. That really simplifies my options and will save me some...
... Alas David, it appears that only some new Macs have good stereo line inputs. Does anyone know different? Stereo line inputs on laptops differ quite a lot....
