I'm having a bit of trouble with my Opcode Studio 3 interface.
I'm just collecting some information. It works fine on my Performa, OS 7.5.1. and OMS 2.3.8.
My Macintosh SE OS 6.0.3 with OMS 1.1.3;
The Studio 3 is connected with two Apple Serial cables (both serial ports utilized)but it only sees it as a Standard MIDI Interface (there is no Studio 3 Driver in the OMS 1.1.3 installation -strange! And when I put a Studio 3 driver from a later install, into the OMS systems folder I get an 'error loading driver' when I startup OMS Setup).
and because of that reason I can not configure the Studio 3 more precisely (ports, SMPTE, etc)
I haven't tried power-cycling it, I'm gonna do it tomorrow and see if I can get it to work properly.
a side note; OMS 1.2.3 requires OS 6.0.8 which I could try installing onto the SE if nothing works.
Here's one more site for the books,
it's a similar error (I do know the Printer port must be used, like the Studio 3 Manual says, because the Studio 3 has a Microprocessor which only connects to the Printer port)
http://duc.avid.com/showthread.php?t=43844Here's a clue:
Q. My Studio 3 is always recognized as a Standard Interface instead of a Studio 3. How can I correct this?
A. The Printer side of the Studio 3 must be connected before it will be recognized as a Studio 3. You can connect the Printer side of the Studio 3 to either the Printer or Modem port of your Mac. Make sure the gray switches on the left side of the Studio 3 are IN & the gray switches on the right side are OUT.
On the other hand, I fixed my PowerBook 165C and it's fantastic,
it's running OS 7.1 and OMS 1.2.3 (with a Studio 3 driver) but it doesn't even see the Studio 3 on the Serial Ports.
I've tried installing a few OMS versions but no avail.
Next thing to try is disabling all unnecasery extensions. -There are a few PowerBook specific Control Panels;
32-bit Addressing On/Off (for if you have more RAM installed -over 2 MB or 4 MB?)
Use Internal Modem or External Modem. I'm very suspicious of that one...
and finally a PRAM zap.
I also wonder if the Serial Switch Control Panel has to be installed?
*edit*
I've found the answer from Opcode old FAQ:
https://web.archive.org/web/19970616184202/http://www.opcode.com/support/faqs/midi_interfaces_faqs/midi_interfaces_faq.htmlQ. My Studio 3 with a PowerBook, is not being recognized. Why?
A. Older Studio 3 Interfaces did not work with most PowerBooks and some 600 series Performas. A new update will now correct this problem. New Studio 3's will not have this problem. If your unit is under warrantee, the upgrade is free. If not, the price is $25. The Studio 3 Interface was designed before the PowerBook series of Macs and is not recognized when doing an OMS search with most PowerBooks. All of our later multiport interfaces, the Studio 4, 64X & 5LX, do work with the PowerBook series as does our Translator Pro Sync.
[TO TOP]
I've found this:
>Studio 3
More professional version of the Translator Prosync in that it 's a 1u 19" rack device. Still 32 channels requiring both serial ports although there are thru switches so you can plug a modem etc in the back. Outs can be configured via OMS. Mains Powered via IEC lead. I've had one of these for years, it's virtually indestructible.
Notes...
Studio 3 / G3 Powerbook fixes...
The reason as to why your Studio 3 works fine on the G3's printer port, but not on the G3's modem port, is a matter of the G3 ports'
sensitivity to the Studio 3's 1 megaherts (MHz) clock output. Specifically, a typical Studio 3's 1MHz clock output has a peak of about 2 volts.
The G3 also requires that the 1MHz clock has about a 2-volt peak for serial communication to ensue.
At this point, you may think all is well because the Studio 3 has satisfied the G3's voltage requirement for the 1MHz clock. However, due to
slight variances in component tolerances (as no component manufacturer is perfect or exactly the same as others) inside the Studio 3, the 1MHz
clock output of the Studio 3 may be substantially fall below 2 volts. As a result, no serial communication can ensue with the G3.
Similarly, component tolerances in the G3 modem and printer ports may cause one port to become either less or more sensitive to the 1MHz
clock level. Evidently, your G3's printer port is more sensitive than the modem port--hence, your Studio 3 works fine when connected to the
former but not the latter.
The powerbook mod will raise the voltage level of the 1MHz clock output of the Studio 3 above 2 volts, thereby eliminating the adverse effects
caused by varying component tolerances. After the mod is performed, I'm confident your Studio 3 will work on the modem port of your G3.
In other words, the modem and printer ports of your G3 will no longer behave differently.
from Opcode tech support discussion forum 21/8/98 (posted by Renan Sanchez, Opcode tech supp).
Powerbook Mod
It's not an upgrade to the software that's needed. The problem is with a
couple of resistors inside the Studio 3. This should help...
Any model of a MAC PowerBook will properly recognize a Studio 3 by simply
adding two, 220-ohm pullup resistors at U12 (26LS31 differential line
driver chip). U12 is located between the two MIDI/THRU switches. The
most convenient way to implement the PowerBook modification on the board
is as follows:
1) Ensure that the Studio 3 is unplugged from the AC wall outlet to
avoid the possibility of getting a severe electrical shock.
2) Remove the top half of the chassis to expose the board inside the
unit by unscrewing a total of 8 screws, which are located as follows: 2
in the front panel, 2 in the rear panel, 2 on the left side of the
chassis, and 2 on the right side of the chassis.
3) Solder the first 220-ohm pullup resistor between U12-2 and U12-4.
Again, U12 is a 26LS31 driver chip located between the two MIDI/THRU
switches. DO NOT confuse the 26LS31 driver chip from the 26LS32 receiver
chip. The latter is located just above the former.
4) Solder the second 220-ohm pullup resistor between U12-10 and U12-16.
5) Reinstall the top cover.
Here's some more information for PowerBooks
https://www.applefritter.com/node/4255