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i just built a midibox64 with 2 joysticks and 12 rotary pots. no DIN, DOUT, or LCD. i have uploaded the midibox64 app, and i can see midi data when i move a joystick, but it crashes soon after. the regulator gets very hot. i used 1k pots, could this be the reason? without the pots connected, i read about 4k resistance between +5 and ground. with the pots connected it goes down to 9 ohms! is this the parallel resistance or do i have a short somewhere? thanks for any tips, greg

fixed! i reheated solder joints, and there was one that looked like it may have been bridged to an adjacent trace. i also replaced the socket for the optoisolator. thanks for your help!

thanks for your help. i've inspected and reheated several solder joints, but i will go over it a second time and report back.

i am using a m-audio midisport 2x2. here are my test results: TEST IN1: passed TEST IN2: passed TEST IN3: FAILED TEST IN4: FAILED (but led lights when connected to pin 8) TEST IN5: passed TEST IN6: FAILED (led does not light ever) TEST IN7: passed? open voltage = 4.87, closed voltage = .05 TEST INOUT1: FAILED (nothing received back into midi monitor) seems that midi is not reaching the rx pin? thanks, greg

oops, i guess maybe my device ID is actually 0. i changed it to 1 in mios studio and got unexpected sysex error: Received unexpected MIOS SysEx message = 00007E400001F7 expected = 00007E4001 i went back over the forum posts and concluded that my device ID is actually 0. any other ideas? i tried replacing the optoisolator, but i still get the same results. i've done the midi troubleshooting tests. they all pass except i'm not seeing midi getting to the Rx line. thanks, greg

hi, i just finished building a midibox64 with kits from mike's electroniks. running mios studio, i get the upload request every 2 seconds: 00000002082380 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000002084274 ms | Sysex message: F0 00 00 7E 40 00 01 F7 the problem is that when i try to upload, the requests keep coming, and i get this error: Sending block 00000000-000000FF Error: Received unexpected Upload Request searching through the forum, i came to the conclusion that maybe my device ID is 1 instead of 0? i found this solution: unfortunately, serge's sysex loader does not appear able to handle hex files. is there anyway to specify the device ID with mios studio? thanks for any tips, greg

wow. awesome, thanks!

another question: is it possible to dedicate specific knobs to specific functions? for instance, could i use a knob to always control shuffle? better yet, could i use one encoder to control both inverse and normal shuffle, so that i could sweep all the way from -15 to +15 in one motion? thanks! greg

thanks for the info. i meant that the TR interface is not enough. it sounds like the MB might actually be very good for what i want. the continous shuffle (96 ppq!) and live capabilities make it a very appealing option. i will have to read more of the documents and forum threads and see if it will suit my needs. thanks a lot, greg

thanks for the info. by roll, i mean a rapidly repeating sequence of notes; think snare drum on every 32nd note. it would be nice to select what value of note you want, like 1/4 all the way to one note for every midi clock, and then hit a button to "roll" a particular drum. i am hoping to find a drum sequencer that uses the roland style as it's base, but with features that are much more performance-oriented. its a good start but way too basic.

hi, i am thinking about building a SEQ and was wondering a couple things: - is it possible to use it as a roland style sequencer? for example, the 16 buttons are step on/off, and the leds rotate as the pattern plays (forgive me if this is how it already works, i can't tell) - is it possible to leave out the lcd and knobs and just have a button or rotary switch to switch between instruments? i'm imagining a simple box with dedicated controls - a shuffle knob, 16 buttons and leds, start/stop button, maybe a button for the clock divide. - would it be easy to simulate roland flam effects? - it would be nice to be able to use the midi clock to send note triggers to instruments, with a divide down for different values. i'm imagining an auto-drum roll, where you just select a clock division for the note value, and hit the roll button to get a continuous stream of notes from the instrument. this would be great for improvising, without having to actually write rolls in separate patterns. would these things be possible with the SEQ? my idea is to build it into a drum machine, so it would need only a bare necessity of features accessible from the panel. thanks for any ideas, greg