Hacking the 404SX

dtunez · Post by **dtunez** » Tue Nov 15, 2011 11:00 am

http://labs.rumori.hu/bankrobber/ is back online

Keep up the good work!

tape smoke · Post by **tape smoke** » Fri Nov 18, 2011 4:13 pm

any one able to hack the machine language to mess with the OS ?

andrewhayter · Post by **andrewhayter** » Sun Jan 22, 2012 10:56 pm

Is this project dead in the water? I wanna see this work with the OG 404

jetson · Post by **jetson** » Sun Jan 22, 2012 11:38 pm

andrewhayter wrote:Is this project dead in the water? I wanna see this work with the OG 404

I'm using the current version. And to be honest, it converts files that the Roland converter rejects, so I'm still loving it.

ailahusky · Post by **ailahusky** » Fri Aug 17, 2012 2:45 am

I have the sp-505, and I have been investigating the "sp0" files. I used a command-line program I downloaded called "rdac2wav", and on it's "MT2" setting I can partially convert the .sp0 files to 16/44100 .wav files. By "partially", I mean that the sample can be heard, but it is interspersed with digital noise. I thought this might be somewhat helpful for those trying to decode the sp(202,303, og 404,505, possibly 808) sample format. I have attached both the open-source program by Randy Gordon, and an example sample of a snare+cymbal hit.

fresh-produce · Post by **fresh-produce** » Mon Oct 22, 2012 8:35 pm

Is there anyway to take the samples of my 404sx and load them directly to my computer?

arcticcircles · Post by **arcticcircles** » Wed Oct 24, 2012 9:41 pm

fresh-produce wrote:Is there anyway to take the samples of my 404sx and load them directly to my computer?

w/ a card reader. cost you less then ten bucks if you dont have one.

ellaguru · Post by **ellaguru** » Fri Nov 09, 2012 11:35 pm

ailahusky wrote:I have the sp-505, and I have been investigating the "sp0" files. I used a command-line program I downloaded called "rdac2wav", and on it's "MT2" setting I can partially convert the .sp0 files to 16/44100 .wav files. By "partially", I mean that the sample can be heard, but it is interspersed with digital noise. I thought this might be somewhat helpful for those trying to decode the sp(202,303, og 404,505, possibly 808) sample format. I have attached both the open-source program by Randy Gordon, and an example sample of a snare+cymbal hit.

OT
Man please make a thread on the sp505 section, this seems very interesting!!

tape smoke · Post by **tape smoke** » Sat Nov 10, 2012 6:28 am

ailahusky wrote:I have the sp-505, and I have been investigating the "sp0" files. I used a command-line program I downloaded called "rdac2wav", and on it's "MT2" setting I can partially convert the .sp0 files to 16/44100 .wav files. By "partially", I mean that the sample can be heard, but it is interspersed with digital noise. I thought this might be somewhat helpful for those trying to decode the sp(202,303, og 404,505, possibly 808) sample format. I have attached both the open-source program by Randy Gordon, and an example sample of a snare+cymbal hit.

wondering if the wav you attached is the actual raw converted data or a recorded sample. this might help someone solve your problem.

Om_Audio · Post by **Om_Audio** » Sat Aug 17, 2013 12:05 pm

this project seems dead, yes? a shame he did SUCH a great job on it!

rmri · Post by **rmri** » Fri Oct 04, 2013 9:11 pm

I'm back and have some updates cooking.
Please follow on Twitter for the latest news.

:arrow:

https://twitter.com/bankrobberapp

Peace

Om_Audio · Post by **Om_Audio** » Sat Oct 05, 2013 5:55 am

NICE!!

Rabot · Post by **Rabot** » Sat Oct 05, 2013 1:04 pm

Really stoked about this !!

GV1 · Post by **GV1** » Sun Oct 06, 2013 3:10 pm

Going to read all this thread later. Maybe I can be of some help. I'm a C and C++ software developer. Very interesting thread though. I tried to hack the Jazzmutant Lemur firmware, but was very difficult.

denken24 · Post by **denken24** » Sun Dec 14, 2014 7:18 am

I work on an MS-Excel tool that helps you to write/edit pattern: See SheetMusic2Pattern in this forum or Roland SP-404SX on my website.

Now I have identified an issue when double-triggering the same sample at different velocity values in a short sequence. I hear a click noise when the second trigger (at lower velocity) is played. I assume that this happens if the double-trigger sequence is shorter than the sample/wav length.

Example: Play 1/16 notes on a surdo. The complete surdo sample/wav takes 1.5 seconds to complete. The second note is triggered after 0.2 seconds at a lower velocity.

Code: Select all

____########_____ Surdo sample takes 1.5 seconds (here: 8 character)
    ^             Surdo sample triggered the first time at full volume
____##........___ Surdo sample triggered a second time at a lower volume
      ^           Click noise when SP is switching to lower velocity value

The SP pattern file looks like:

Code: Select all

18 80 00 00 00 00 00 00
30 61 00 00 64 00 00 01
18 61 00 00 64 00 00 01
48 61 00 00 19 00 00 01  * click...
18 61 00 00 64 00 00 01
48 61 00 00 19 00 00 01  * click...
18 61 00 00 64 00 00 01
18 61 00 00 19 00 00 01
...

The meaning of each row of a SP pattern file:

Code: Select all

18 61 00 00 19 00 00 01
|  |  |  |  |  |  |--|
|  |  |  |  |  |  Length (Ticks, 2 Bytes)
|  |  |  |  |  unknown
|  |  |  |  Velocity (0 - 127)
|  |  |  unknown
|  |  Channel Offset (00=ABCDE, 01=FGHIJ)
|  Pad (MIDI-Note, 47-106)
Interval (Ticks)

Is there a way to trigger the same pad two or more times in a kind of polyphony or do I have to copy the sample to another pad and trigger this one?

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Click noise when double-triggering the same sample