/tilted/
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Posts posted by /tilted/
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Doesn't sound too awful to me.
It sounds like most of the issues are in the analog output section.
I'd suggest replacing the master volume pot, or at least try stripping it down and really cleaning it out.
The rest of it sounds largely cosmetic from what you've said so far.
P.S: Let's hear some samples... Maybe it's time to do a circuit bent album...
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I was just sh*t-stirring.
I'm very intrigued by the idea behind this microphone. I had no idea such things had been successfully used.
They might be very useful on stage. Not really for performers (not live anyway), I'm mostly thinking for technician communication via headsets.
Of course for recording, they might be very interesting, if a little uncomfortable. I'd reccommend getting a "proper" mic for recording if you want a clean sound, but for a gritty, ear-prickling sound, these would be something a bit different.
Let us know how it turns out.
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The Digikey entry for these suggests they are 24 pulse per rotation, quadrature, mechanical. I see no great reason why they won't work.
You might have issues finding knobs to fit, though, and the shaft seems very short.
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its apparently one of the old bomber microphones from world war 2, so somewhere between 41 - 45.
Don't take this the wrong way, but are you by any chance from America?
It's just that I seem to recall the war starting around 1939... :P
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this is perfect timing. I've been thinking I'm gonna need some steel panelling for a crazy sid case I'm dreaming about, which will need to be a bit tougherr than the norm...
nice work levon.
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I've got a bunch of these here in au.
I can send you one if you like.
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How the hell am I supposed to pronounce a word like Aoyue?
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Also, in LCD territory, looks like you need to change this line in file: setup_midibox_lc.asm
#define LCD_EMU_COL 55
needs to change to
#define LCD_EMU_COL 48
since you have 2 x 24x2 displays, not 40x2.
This line sets how many columns are emulated, and the current setting of 55 is whay the first photo shows
[tt]xxxx--- ===<Lo ]Gap[mulatio n ready . >===[/tt]
Instead of looking more like this:
It is possible, but probably not likely, that this is part of your LCD trouble. The Core is trying to display more columns than the LCD can show.
Probably has nothing to do with the static display, but almost certainly would explain the incomplete display.
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well you don't need to move envelopes around on the CAN bus to use the other two VCAs for another SID pair - just go old-skool and simly use wires ;) nobody stops us from connecting the other two audio and CV connections to another SID/AOUT :) so in fact doing VCA feedback doubles the number of modules needed for a full mb6582 from two to four.
Ok, You got me. Don't know how, but I just hadn't seen it that way... This is definitely the most obvious way to do this. :-[
yes that diagram is what I'm doing. What do you mean with "bypass all oscillators"? I can only switch them on or off, and with off the only thing left would be a sine as long as the ssm filter is set to oscillate.Off hand, I can't recall how the MBSID handles it (TK?), but the SID chip will supposedly do it. Register 0x17. 4 bits for filter resonance, and 4 bits for each of EXT, OSC3, OSC2, OSC1 routing to filter (set high) or direct to output (set low).
uhm why would I want to not use the SID filter at all and still need the feedback loop? I thought the whole intent of doing feedback at all was to increase the VCF's resonance, no?It is just a suggestion, you don't have to do it. I did get the impression from the bigmesh article that this was also a way to make complex, gritty sounding waveforms, with or without the use of the SID filter. Think of the feedback loop in an FM algorithm synthesiser. I thought that this sounded at least possible. If it serves no benefit, then by all means leave it. I don't want to tie you up with minutae, when you are still working on the VCA board...
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I've never had trouble logging into the forum, but the wiki has serious issues with my switch-ridden nick. if I put in "/tilted/", the wiki shits a brick, but if I use "tilted", it works.
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OK I've checked out using the VCA for controlling the SID feedback a bit more in depth - originally I hadn't thought of activating the external input flag ;) so it IS possible to do this (doesn't hurt to adjust the VCAs for a little more gain), but I still find the effect not really exciting. Feedback seems to be an easy way to give the SID's internal filter some more resonance as long as you don't have external VCFs, but the change isn't drastic enough to justify doubling the number of VCA modules and using up the last two remaining CV channels on my AOUT_NGs. If I want mean resonance, I'll continue using my ssm2044 vcfs for that :D
I absolutely don't see the need to add extra VCA modules, but since the chip is a quad anyway, and we can't move envelopes around to use the VCAs for other SID pairs, it seems right to use all 4 VCAs on on SID pair.
The bigmech page about the feedback loop
AFAIK the feedback does certainly help with the originally whimpy resonance of the SID filter, but if you bypass all oscillators, and the EXT input, (which you probably would when using the much tastier SSM filter) then you could get some more gritty, noisy almost FM-ish sounds. I imagine the confuration as basically SID as oscillator bank, with feedback, then to SSM Filter, then SSM VCA. Kinda like this:
[tt]
{ext in}-+---{SID}----+-{SSM Filter}-+-{SSM VCA}---{Output}
\-{SSM VCA}-/
(feedback loop)
[/tt]
I used the feedback pot connector of the mb6582 board, i.e. put the VCA between audio out and audio in of the SID. No additional parts. do you think a coupling cap would make sense here?
Don't know if you need to ADD one, just saying that since the SID is DC coupled (single power rail +9v/GND), and the VCA looks to be AC coupled (+V/0/-V) this might reduce the effect if not properly coupled, but if you used the 3-pin header (J3/23_SIDx on Wilba's 6582 board) it should be fine. Just make sure all OSCs, and EXT IN are set to bypass the SID filter.
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Niice!
If it works, it would be awesome to have a pair of VCAs post filter, and a seperate pair for feedback.
This would mean two add-on boards per core, and no need to move envelopes around the CAN bus.
I'm still researching if it makes sense to use the two other VCAs to control the SID feedback level. I've tried that out once but got mostly a little variation in level, not very exciting - either I made some mistake or the 6581 simply doesn't give much effect by using feedback - I'll have to try it with 6582s :)
Just curious, did you try it post - coupling cap? pre-filter board?
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I don't believe in the pancake bunny.
Or the pikelet fairy.
Or Father Crepemas.
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Thank you.
the problem is was a broken link from the [[projects]] page.
Link fixed, link was [[:home:project:synthesizer:midibox_fm]]
is now [[:home:project:midibox_fm]]
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I love old casios.
Such a shame they turned their attetions completely away from actual synthesisers, to the (probably more lucrative) world of lame 'home organ' style romplers.
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odd- I just attempted to document this cable-length issue, but it seems there is NO MBFM PAGE.
is this possible?
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It seems to me that the verdict is in, and nILS really has to hurry up and do a core/FM combined board design!
and nILS- I need it to be no larger than a well-fed bull-ant, and I'll also be running outlook express on it, and I need it dipped in 2 part epoxy and delivered to my door no later than three weeks ago. Get to it, son!
nice piece of troubleshooting, Wilba.
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I need 8 trout, plus PICs, base board, CS board, LCD, encoders,knobs, full parts kit, completely assembled, dipped in fine belgian chocolate and then bronzed.
I'm doing an internship at a museum, and I need it in time for world expo 88.
kthxbye.
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Jack Bauer dies? I thought it was Harry Potter?
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See here:
http://www.midibox.org/forum/index.php/topic,12531.0.html
Summary: the TL072 (the only chip in the design which gets +/- supply) will happily run on +/-15V.
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There was a series of articles about room treatment in Audio Technology magazine (an Aussie mag, which is really, really good IMO).
Alas, they don't seem to be available online.
There were a lot of interesting points layed out, often more as a discussion point, rather than the traditional "This is the only way to do it right. If you don't do it this way it will be terrible" approach. I'll try to summarise as best I can.
If you have more than one room available, you'll want to figure out what sort of spaces you want to end up with. For example, even if most of your music is electronic based, you might occasionally want to do some live drums or vocals.
Depending on how often you do live recording, it might make more sense to do these recordings off site, rather than dedicate a portion of your space to something you rarely use.
If you have one room to do everything, it might make sense to make some moveable isolation panels, if you're likely to record an acoustic instrument or two.
Also, depending on where you live and how nice your neighbours are, you might want to do some acoustic isolation. There is a vital distinction between acoustic isolation and acoustic treatment.
Damn, all the stuff I've just typed is fairly useless really, I wish I could lay hands on those articles.
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Hey, cute toy. The demo of the display looks good too (despite the poor video recording).
That is really cool.
I have to agree though about the video. -Bloody hell, get a tripod! or better yet, use a camera, not a telephone!
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I think it just moved.
Thanks wilba.
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The north pole is not specifically a big deal, since this is sea ice, and it expands and retracts seasonally anyway.
The real problem (especially for Europe) is Greenland. If the land based ice on greenland should melt and flow out, there are real concerns for potential disturbance to the gulf stream. This relates to Europe especially, since this current is one of the big reasons why europe is warmer than it's latitude suggests it should be.
Apologies for the massive picture, the point is that temperature is usually based on latitude, except of course in the very high mountain ranges of the Rockies, the Andes, the Himalayas, the Tian Shan... If the gulf stream were to shut down, or even slow down (which it already has started to do...) there would not be this movement of warm equatorial water, which warms europe. the result of this would be significant cooling in europe, while the rest of the world is trying to avoid warming.
How to wire a retro throat microphone
in Miscellaneous
Posted
Not really a surprise for 60 year old elastic... :D
You might find it's a different story after a while on stage. How easy is it to take off/put back on? You might find the most comfortable way to use it is to just take it off when you're not using it!