TriplePlay 1.Version (27.9.1999)
This was a new PCB for the TriplePlay from Ryan Osman (firstname.lastname@example.org).
TriplePlay 2.Version (30.9.1999)
As I tested the PCB from R.Osmans projekt MIDI-In won't work, so I
altered it. I think the reason, why it don't work, was, that in the
1.version no translation was made
between the TTL-logic and the RS232-logic.
Triple Play 3.Version (14.10.1999)
Also there was no translation made backwards between RS232-logic and
TTL-logic. The circuitry of R.Osman gives to the MIDI-ports 12V.
THAT WAS VERY DANGEROS. MY DB-50XG CARD WAS DAMAGED BY THIS HIGH VOLTAGE.
(But YAMAHA was very accommodating, and helped me with a new DB-50XG :-D )
First I havn't see this. As my card was died, it was to late. ...
that was my risk. Everybody, who build such things for his own use,
makes this at own risk.
I have learned ...
First I put some resistors at the MIDI-Out-ports.
Then I removed MIDI-Thru (this port is to find at the most
As above sayed I altered the MIDI-In circuitry (the translation
between the TTL-logic and the RS232-logic was made in a primitive way
This TriplePlay2 projekt works fine. But I warn you: Don't use it
with other MIDI-devices than such, that have standard MIDI-ports, see
above ... I say only: 12V ... .
The main difference to the previous versions is the IC "MAX
Triple Play 3 small Addenum (17.12.1999)
This circuit makes the translation save, fast and with low power
consumtion. It takes only 5-8mA current. This is important, because
the voltages at the serial port are gives only at maximum 20mA.
The MAX238 makes the translation in both ways from TTL -> RS232
In this way the MIDI-Ports are real driven with the right 5V logic of
I reinsert the MIDI-Thru-port. So the TriplePlay-MIDI-Interface is
This kind of circuitry you see at the TP3Plan.iff is real very save.
It is also compatible to TTL-inputs of other MIDI-hardware (like the
DB-50XG-card from YAMAHA) without optocouplers at the input.
- added a possibility to switch the TP3-MIDI-Interface to a
- reworked the gif's & guide
(thanks to Kjetil Svalastog Matheussen, who give me some hints)
At this place I will also say you a fact, before you try this all.
Have you ever used Bars&Pipes with 16 channels and many notes and
other datas like PitchBend-data or SystemExclusive-datas?
If your AMIGA have had problems with this, it is not probable, that
it can handle the full possibilities of 3x16 channels with many of
If you not often use PitchBend-data or SystemExclusive-datas the
Sequencer works fine with the TriplePlay-MIDI-Interface and 3x16
In the other way I think a 68040 processor with 40 Mhz is the minimum
of the work with this TriplePlay - MIDI - Interface.
But try it. Bars&Pipes have so much possibilities ...