Circuitbenders Forum
Circuitbenders Forum => Circuitbending discussion => Synths & Samplers => Topic started by: phantompowers on November 15, 2009, 01:07:39 PM
-
(http://i224.photobucket.com/albums/dd186/RockinRob_2007/SA-Xbends.jpg)
If anyone can spot any mistakes on this please let me know and I will edit it.
Can I have some karma please!
-
The power crash works better if you use some resistors to make a pot that goes from about 50-250ohms or something, rather than just sticking in a 1k. Theres been some discussion on this on the long SA1 & PT20 thread.
-
THANKS for posting that illustration. it is a lot easier to see than the one on casperelectronics.
does "casper" post here?
-
karma coming your WAY thanks for putting this up ive just picked up a sa-2 for 50p and i know ive been ripped off !!
-
DJ Synchro's Screaming Distortion mod is pretty nasty... well worth including! I like to use body contacts on a couple of the glitch points too, it offers a slightly different feel to the push buttons.
(http://img102.imageshack.us/img102/9841/sa1screamingbend8vy.jpg) (http://imageshack.us)
Here's my screaming bend, I have a 4700 Log potmeter with a 5600 resistor in parallel, because I had no other potmeters when I did the bend. somewhere around 2 or 3K will probably work best. The bend works well with the Voltage Drop, it's possible to get a screaming distorted sound that still tracks the keyboard.
By the way, tried the Deep Crash F@#%N awesome!
-
i wonder whether i need logarithmic or linear potis for that mods!
could anyone help me with my sa-20?
which of those mods could work on the sa20?
thanks alot =)
-
i think this keyboard, which i have, will be my next bending project. i just have to get the cash together for another component order first!
there are a few things i want to build. i want to try a variety of lfo synths (wsg, atari punk, lumavox, etc). so, when i make another order, i am going to get enough to do everything i want to do, and at least 5 of each of the lfo synths!
i know this is another thread already started, but more specifically, where is a place i can order crystals? b&g did not have any when i ordered from them.
-
not to be rude to DJ Synchro - much respect there - but the casper 'feedback' mod is exactly the same bend; it uses different points on the board, but they connect to the same components, at least on the SA-2.
does sound sweet, nonetheless ;D
-
Any ideas on how to add a cutoff filter to the sa-x keyboards?
-
I found a mistake - when I tried soldering the hidden sound select switch to the two pins, instead of any of the keyboard keys changing the sound, some of the keys just played thirds instead. Are the pins wrong or am I doing something wrong?
-
Working on SA-8
(So far done LED, a jack was added by a previous owner, differently from the pic, so i'm removing that and adding a new one, I'm also planning to retain internal speaker with option to turn that off).
So far:
I've noticed that the 5th connections - one works for the lower end of the keyboard only, one for the upper part only... so if you want the option of 5ths throughout the keyboard it might be an idea to wire the switches such that the 3rd from left pin can connect to both 1st and 4th from left pins at the same time (I'm planning on using 2 on/off switches so that each 5th connection can be turned on/off separately) - hopefully both 5th connections can be made at once without adverse effects (??)
-
Update: Connecting both 5ths - gives 5ths on top and bottom, but nothing (no root or fifth) in middle of keyboard.
-
I'm getting some wierdness with the drum switches.
No drum sounds, but I can get the most bizarre whitenoise. Connect snare, hihat, then snare again, and I get a sequence of white noise. Very strange.
-
Nearly finished with my SA-8.
Have done everything here, and more (like a reset switch), except the pitch shifter,
The power crash: I'm using 1K pot, with 3X1K resistors in parallel - this gives a range of 0 to 250 ohm if my maths is correct - even so, is super sensitive
Things left to do:
1. I'm getting some wierdness with the drum switches:
No drum sounds, but I can get the most bizarre whitenoise. Connect snare, hihat, then snare again, and I even get a sequence of white noise. Very strange.
On the SA-8 there are actually 4 drum switches on the front panel already - Cymbal, Bass, Snare, Hihat - so I guess the bend versions would be redundant anyway?
Oh-well drum switches abandoned
2. Hidden sound thing
Will this even have an effect on SA-8? The front panel already gives 25 sounds (two digits each 1 to 5).
3. Case mounting
(P.S. Modify message gives an error when I submit the modified message)
-
Added Demo songs and cowbells from
http://www.casperelectronics.com/finished-pieces/casio-sa-keyboards/ (http://www.casperelectronics.com/finished-pieces/casio-sa-keyboards/)
-- see Comment 9 from PHOBoS
About to try the hidden sounds from the same comment, since the hidden sounds above don't seem to apply to SA-8
Does anybody have a full list of the SA-1 sounds, or, alternatively an image of the front of an SA-1 which is large enough to see the sound names on?
-
Got me an SA-1 and I'm planning to stick in the voltage drop, glitch and feedback mods as well as a line out. I'm looking for some advice though as space is really at a premium inside these things/ I'm wondering if anyone has successfully and cleanly removed the speaker grill. I think I'd like to do this as it would give me space for my pots and switches but I'm not sure how to do it without making a mess of it. Anyone got any thoughts?
-
I need to keep my eyes out for something in this line!!
-
They're fun to bend!
- Scream, Glitch and voltage drop all successfully installed, just the filter to do (and maybe the pitch bend if I can work out how to substitute the crystal for a hex schmitt oscillator). One bit of advice I'd give any nooby looking to get busy with an SA - the way the battery compartment is designed makes it a pain in the arse to keep opening and closing to test your bends are working as you install them. Luckily the SA-1 will run off a 9 volt so I hooked up the spring and the big positive jumper to one and found it worked fine with the back off. sometimes need to press the circuit board down as you press the keys but it's a lot more doable this way than either trying to hold all four AAs in place or opening and closing every time you test something.
-
I usually use a battery holder and a couple of crocodile clips, and solder a temporary on switch onto the circuit for the extra convenience factor. I do this on a lot of projects actually, makes it easier for testing voltage drops and often means you can put a big chunk of casing to one side while you're working on it.
(http://t2.gstatic.com/images?q=tbn:ANd9GcTXMf-7mOKjZuYuq7XrnN7DvWg4PjW6B_CJflv6c-xhONe5pGQ&t=1&usg=__a6tc4mDw8Y1TY7BxHFPF1uheHYs=)
-
The hidden sounds will make a difference - The Casio SA-8's buttons correspond to buttons 0, 1, 2, 3 and 6 on an SA-1. The hidden sound switch will give you an extra button 4, making you 11 sounds better off.
-
You can get 100 (instead of 25) sounds from the SA-8 - in other words, there are 75 hidden sounds in the SA-8
see http://www.casperelectronics.com/finished-pieces/casio-sa-keyboards/ (http://www.casperelectronics.com/finished-pieces/casio-sa-keyboards/)
-- see Comment 9 from PHOBoS
I have tried this it works.
However unless you have a compelling reason to have the sound numbers the same as the SA-1, I would suggest that you do NOT renumber the existing tone buttons as PHOBoS advises. Instead re-order the SA-1 sound list to match the button labelling system.
Thus:
Tone 1 button stays as tone 1
Tone 2 button stays as tone 2
Tone 3 button stays as tone 3
Tone 4 button stays as tone 4
Tone 5 button stays as tone 5
New buttons:
Tone 6 is a push-to-make button connecting pins 26 and 15 on the OKI
Tone 7 is a push-to-make button connecting pins 25 and 11 on the OKI
Tone 8 is a push-to-make button connecting pins 25 and 13 on the OKI
Tone 9 is a push-to-make button connecting pins 25 and 14 on the OKI
Tone 0 is a push-to-make button connecting pins 25 and 15 on the OKI
Now the two digit tone numbers 11,12,13,14,15... upto 55 are unchanged from the descriptions on the original front panel, but the new buttons allow access to the additional sounds.
The sounds using this number scheme are :-
-
00 STRINGS/OBOE
01 TRIANGLE
02 CONGA/AGOGO
03 COWBELL/CLAVE
04 TOM
05 BASS/PIANO
06 ROCK DRUM
07 SWING DRUM
08 BASS/TRUMPET
09 PIANO/FLUTE
10 ACCORDION
11 PIANO
12 ELEC PIANO
13 HONKY-TONK PIANO
14 HARPSICHORD
15 PIPE ORGAN
16 JAZZ ORGAN
17 ELEC ORGAN
18 CHURCH ORGAN
19 STREET ORGAN
20 CLARINET
21 BRASS ENS
22 WARM BRASS
23 TRUMPET
24 TUBA
25 ENGLISH HORN
26 BRASS HIT
27 WIND ENS
28 OBOE
29 BASSOON
30 BRASS-STRINGS
31 SAMBA WHISTLE
32 WHISTLE
33 QUENA
34 FLUTE
35 BAGPIPE
36 FLUTE-VIB
37 OCARINA
38 HARMONICA
39 CHORUS
40 SLAP BASS
41 STRINGS
42 WARM STRINGS
43 VIOLIN
44 VIOLIN-PIANO
45 JAZZ GUITAR
46 CELLO
47 ELEC GUITAR
48 MUTE GUITAR
49 METAL GUITAR
50 PEARL DROP
51 GLASS HARMONICA
52 FANTASY
53 WAW VOICE
54 TWINKLE ECHO
55 COSMIC DANCE
56 METAL LEAD
57 CATHEDRAL
58 PLUNK EXTEND
59 POP LEAD
60 SHAMISEN
61 ELEC BASS
62 WOOD BASS
63 SNARE BASS
64 UKULELE
65 MANDOLIN
66 BANJO
67 SITAR
68 HARP
69 TAISHOKOTO
70 SYNTH-BASS
71 SYNTH-PIANO
72 SYNTH-CELESTA
73 SYNTH-CLAVI
74 SYNTH-ACCORDION
75 SYNTH-LEAD
76 SYNTH-BRASS
77 SYNTH-REED
78 SYNTH-STRINGS
79 SYNTH-GUITAR
80 TYPEWRITER
81 AIRPLANE
82 AMBULANCE
83 INSECT
84 EMERGENCY ALARM
85 TELEPHONE
86 LASER BEAM
87 COSMIC SOUND
88 CAR HORN
89 COMPUTER SOUND
90 WADAIKO
91 VIBRAPHONE
92 MARIMBA
93 CHURCH BELLS
94 BELLS
95 ETHNIC PERCUSSION
96 GAMELAN
97 AFRO PERCUSSION
98 SAMPLE PERCUSSION
99 MATSURI
-
One other thing, PHOBos also advises you can add demo's by adding push-to-makes between OKI pins: 24-15, 24-16, 24-17.
I think he might have made a slight mistake (or I have wired it up wrong), since I did this, and while getting demos from these, one of them is the same as demo already available. I haven't yet investigated if this is my wiring or his mistake. Whenever I get round to it (may be some time), I'll post here.
-
Feedback installed. However, instead of a distortion, nothing happens for the first half of the potentiometer turning and for the second half, firstly the sounds make a few loud blips as I play them, and when it is full there's just a constant whiny thin square wave that bares no resemblance to the notes I pressed or the instrument I'm using. Surely it should just sound overdriven and self-oscillate at the highest setting? I'm using a 1K potentiometer connected in series to a 1K trim, like on the diagram. Do I need to adjust the trim?
-
No the feedback mod doesn't really work like that - it's more like a distortion with a tuneable feedback/ synth-like tone that fights against the notes you play, sometimes in a pleasingly glitchy way. Think of it as being in the same family of effects as the fuzz factory/ diabolical fuzz burglar/ truly beautiful disaster etc. (if you know those effects)
I'll be honest I prefer the version of this mod that you get on the MT205 - the feedback tone goes higher and doesn't completely destroy the sound of the keyboard in the way that the SA1 seems to. Also the actual distortion on the sounds is warmer and more musical whereas on the SA-1 it's a pretty harsh, fizzy sounding distortion - although you can still get some pretty cool sounds with the SA-1 depending on which of the presets you're using.
-
Hi,
I'm new here, currently bending a casio SA-8.
I'm going to install the extra tone buttons as described by PHOBoS and samspike on the Casper website.
Just wondered if anyone had tried to re-wire the drum-pad buttons for the extra tone numbers?
I was thinking about cutting the traces and using them, as I don't really want the drum pads. Do you think i'd be better off just putting in new switches for the extra tones, is rewiring the drum switchess likely to be very fiddly and more hassle than its worth?
thanks
Bob
-
did anyone see the video i made for mine?
-
Sorry for resurrecting this thread, but instead of pissing everyone off by making yet another SA thread, I thought I'd just post here.
Anyway, fellow board member, and totally awesome guy, Electroyd sent me an SA-8, I bookmarked this thread for the awesome schematic posted. When I hooked up the "Glitch Randomizer" I don't get the kind of glitch we all know and love from the SA keyboards. Instead of the ambient mix of sounds, I mainly get quick bursts of the different keyboard voices. This is cool and all, but I was really hoping for that ambient mix of sounds.
I opened the thing up and poked around, eventually finding something that gave me the ambient mix, but it quickly drained the batteries, and then it kind of killed the keyboard for a couple hours.
Has the kind of glitch that I got (the random voice spurts)? And would you know how to get, or want to let me know how to get the normal glitch everyone else has?
Also, has anyone had any problems with the "Hidden Sounds" switch on the SA-8? When I hooked it up, I got the effect of the 5th Switch on the first and fourth key.
Thanks in advance.
-
i tested that bend, and that was the kind of "glitch" i got too. i didn't hear what was so special about it, so i left it out.
try hooking up a vactrol or a vco to it. poke around and experiment with that and you will get some unique tones. there should be one or two body contacts in there.
maybe take it a step or 2 beyond what the norm is doing, and make a lowpass vcf and hook that up to the output jack/speaker.
-
I'm having the same problem with mine the sensitive body contact only works..and not so well.. with alkaline batteries.
i think that is the real problem...like with cameras..some batteries especially from pound shops or similar have no strength to keep that level of power to make it crash proper(on the main rocks)..
for the hidden sound i guess those could be located somewhere else..by following the ultimate schematics posted..i have had the same problem no hidden sound but instead a reliable 5switch...best solution?..i guess is take the situation under control and with patience look for the treasures..it could also b cos of the year is been re lased..sometime those beasts are slightly different....gonna take out mine from the to do box and see if i can help...
Sv
-
Apparently de-powering the keyboard a b helps it to crash better..i'll suggest you to use the power starve as a fine tuning for voltage i'm about to install it inside with a trimmer..my crash contacts seems to work much better now.
-
Thanks Simon! I'll have to try that this weekend.
-
still not perfect Dylan i dont know why this morning the kboard doesn't want to crash!! GGrrrr!!
..damn sa!!X. :(
-
Hmmm, I'll do some more poking around tomorrow and I'll take some pictures if I find any good spots.
-
Got the glitch! Finished this keyboard a few weeks ago but didn't wind up making a video until this past weekend. I'll try to post a picture of the points on the IC where I got them for the others who were having trouble.
Circuit Bent Casio SA-8 (http://www.youtube.com/watch?v=cweX_osAEZw#ws)
-
I'm still watching mine...is in the table just in front of me.. i hate it!!...your seems to react quite well...i like it!
-
Grr, forgot to upload that. Here you go, just hook it up like the "Glitch Randomizer" (pushbutton with a 1M pot). Hope it works for you.
(http://farm4.static.flickr.com/3171/5732121394_2373eb06c5_b.jpg)
Sorry for the size!
-
I did a SA-8 a while ago for a friend. Its simple. I never had any problems with the bends, and used alot of Caspers ideas, with some tweaking of my own.
Ill put up another video of another SA-8 i did for myself sometime later
http://youtu.be/ALwye7ra7m8 (http://youtu.be/ALwye7ra7m8)
-
hi everyone!
i just ordered a LTC for my SA-10, it worked for 5 minutes but then i think i fucked up the ltc couse i just had it on the breadboard, the resistor between pin 1 and the pot was out i wrongly puttet it in between pin2 and the pot.
do you think the ltc is destroyed?
and now, i dont want to wait for another one, i just thought of building a 555 oscilator, is it possible? usually the clock is like 22mhz, can the ne555 go that high anyway? and do you guys know what i should use for the resistors and caps etc. because i have nothing to messure that high frequencies.
best
demian
-
Hey guys, newbie here,
I’ve been bending my Casio SA-2 and getting to grips with a few of the bends on here, added the volume, drum pads out, I added a power crash out. Since then, something has happened, my keyboard only plays at a really low volume through the speaker and aux out even when i disconnected the power crash mod and made sure nothing is short circuiting… reckon I’ve blown the op amp, it is possible that I hooked it up to 9v adapter by accident (even worse, I may have even reversed the polarity)? how would i find out if I’ve blown it? any suggestions, could I have blown something simple to replace?
-
Does anybody have the instructions for djsynchro's scream distortion mod? I think the old topic had a picture of it, but it's gone now.
-
Did someone injected successfully a LTC1799 on SA-8? Either switching with the original clock or not?
Many Thanks! ::)
-
Hello everyone!! i know its a veeeeeery old topic,, but maybe this help someone than (like Me) is looking for info about bending casio SA series,and find this topic….
I think the picture at starting of the topic its in a certain way wrong…
For what i see all the pin conexions at the OKI chip are inverted… UP is DOWN and DOWN is UP.
im not shure about the OpAmp chip,,, havent have the oportunity to check it.
Am I Wrong?? Did i miss something??
PD: please forgiveme for my English, im try me best but it is not my language ::) ::)
-
Instead of using a crystal and two capacitors to change the clocking, why not just use a resonator? They are available from Murata (and maybe others,) in a number of useful frequencies, AND they have 3 pins, so I believe it should just be a direct swap. In fact, correct me if I am wrong, but isn't the stock component actually a resonator, since it has 3 pins and not 2? Anyway, I am going to try this myself and will let you know the results.
-
I recently bent my Casio SA-8 using this thread as my guide, so thanks to everyone for sharing all the info. Most things seem to work, I’m not that keen on the original glitch bend , I’m guessing it wasn’t really meant for the SA-8 ? I didn’t manage to do the power starve mod either because I couldn’t find at pot less than 1k. I did the clock mod with a 6mz crystal but to get it to work I have to put almost spent batteries in and to get the glitch to work I have to put new batteries in! I suppose the power starve would have helped with that. Has anyone swapped out the clock altogether and used a LTC1799 successfully ? I added a couple of trigger in’s that are nice to have going while messing about with the feedback mod.
https://imgur.com/gallery/XDEset8 (https://imgur.com/gallery/XDEset8)