Tag Archives: drumtraks

LinnTraks – SCI Drumtraks with LinnDrum samples

I occasionally get asked to burn some eproms. Twice I’ve been asked to fix LinnDrum sounds for Drumtraks. The good thing about many old drum machines is that they use the same type of eproms and audio compression. For example, you can take the kick eprom from a LinnDrum and put it directly in a Drumtraks.

In some cases, two sounds share the same eprom. One example is the Drumtraks where the first 4 kB in an 8 kB eprom is the clap and the last 4 kB is the tambourine. In the LinnDrum each sound has a 4 kB eprom each. Most probably because the larger the eproms were, the more expensive they were. And the Drumtraks is a couple of years newer than the LinnDrum, hence the larger eproms. So the thing is that sometimes you have to merge and sometimes you have to split. And sometimes it just fits. This process is 100% non-destructive, not a single byte is changed!

Anyway “Thomas Q-force” asked me to replace all sounds except the ride and crash in his Drumtraks with LinnDrum samples. He chose the standard sounds with the exception of the toms, where he selected the alternative, but official, “tom7”. Sounds great in my opinion! The LinnDrum sounds are much better than the stock Drumtraks sounds. This really shows the potential of the Drumtraks and I find it strange that it’s so cheap compared to a LinnDrum.

View video on YouTube (opens external site in new window)

Miami Vice snare for Drumtraks, LM-2 and other drum machines


Today I spent a couple of hours converting a wav-sample of Jan Hammer’s snare drum to my Drumtraks.
Download it here VICE-SNARE.ZIP, and read more about it below (this is the readme.txt included in the zip).


Jan Hammer's Miami Vice snare installed in my Drumtraks
Jan Hammer’s Miami Vice snare installed in my Drumtraks

Jan Hammer’s Miami Vice snare for vintage drum machines

This is the legendary snare that Jan Hammer used on several Miami Vice tunes like the Main Theme, Chase, Last Flight, Tubbs and Valerie, to name a few…

I’ve heard rumours that Jan himself sampled a real snare and put it in his Linn LM-2.

A couple of years ago I found a file called VICE-SNARE.WAV in a Miami Vice forum some years ago and saved it on my hard drive. This wav is a heavily reverberated recording, probably from the output of a Linn LM-2. Getting the original EPROM data would be a dream come true, but this will have to do!

These are the steps I’ve performed:

1) Resampled the file to 24 000 Hz, which is the normal sample rate
2) Cut away the first 4096 samples, because this is the length that the snare has in the Linn LM-2 and SCI Drumtraks. I discovered that this is just the length needed, the rest is the reverb tail.
3) Converted the wav to the special audio format that these drum machines used using WAV2DMX from Electrongate
4) Saved the final result to a bin file. This can be burnt to a 2732 EPROM if you have a Linn LM-2. For the convenience of the Drumtraks users, I also joined it with the Linn LM-1 rim (downloaded from Electrongate) that can be burnt to a 2764 EPROM. On the Drumtraks, the snare and rim shares the same EPROM.

The sample has a very abrupt end, and this is probably how it originally was. Jan used reverb, like most engineers did at that time, to mask this. If you listen to the recordings, you can hear that there’s a lot of reverb on every one of them.
Another thing that is important is the tuning. Both the LM-2 and the Drumtraks allows tuning, and you can hear on Jan’s recordings that the tuning varies from song to song.

VICE-SNARE.WAV – the original file found on the Miami Vice forum. This is probably sampled from his drum machine (Linn LM-2) and fed in to a reverb unit.
VICE-SNARE cut.WAV – this is what’s left of the above file, the first 4096 samples.
VICE-SNARE.BIN – the above file converted to the drum machine format. This should be used if you have an LM-2.
VICE-SNARE_LM1-RIM.BIN – the above file joined with the rim sound of the LM-1 (this is not sampled, it’s the original binary data). This should be used if you have a Drumtraks
VICE-SNARE demo.mp3 – short demo tune recorded from my Drumtraks. First a beat with a reverberated snare. Then all the possible tunings of the snare are demonstrated.

Credits to Jan Hammer for creating it in the first place.
Credits to the guy who uploaded the

Converted by Carl Jakobsson, http://www.nattvard.com/cmi , 10th November 2013

Drumtraks arrived!

Today my SCI Drumtraks 400 arrived! Unfortunately I’m so fed up with work so I haven’t had much time to play with it yet, just a few minutes. But my conclusion so far – it sounds fantastic! The kick is so deep compared to the DMX!

A fun little trivia: I’m the third owner. The first owner was the german italo/techno/electronic/new beat producer Andre Fischer. He bought in back in 1984 together with an SCI Six Track. Two months ago it was shipped from Berlin and sold the second owner who used it on a few recordings and then sold it to me. I was actually offered to buy it a month ago but it had problems with the kick channel which was later fixed. Here are a few songs that this particular Drumtraks was used on:

Kim Cesarion – Sir Sampalot Remix

Expect a few demonstration videos in the near future!