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11
would really like to put this one to bed;
ive contributed a hell of alot of my time to this site
if someone could jsut do me one back and upload this cd
would really be great to turn the page on this one
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General Hardware Discussions / Re: The "FrankenMac G4"
« Last post by Enabler on Today at 04:09:58 AM »
Keep a close eye on eBay as they come & go on there.
I bought a few on ebay over the last 5 years so be patient
I have paid anywhere from $50 to $100

Magma is out of Business now so this stuff is getting harder to find :-[
Here is one now with the Intel Chipset for proper use in OS9
https://www.ebay.com/itm/Magma-PCIHI68-01-03527-00-PCI-Expansion-System-Host-Interface-PCI-Card-36832/192976104917?hash=item2cee45add5:g:dFwAAOSwhktdHtPD
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General Hardware Discussions / Re: The "FrankenMac G4"
« Last post by IIO on Today at 03:53:02 AM »
how did you manage to find the PCI host card? or did you ignore the usual price tags (what did you pay?)
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General Hardware Discussions / Re: Mac turning on by itself?
« Last post by IIO on Today at 03:49:39 AM »
it tries to get your attention.
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Cubase/Nuendo by Steinberg / Re: Nuendo 3 installer CD/DVD
« Last post by macStuff on Today at 03:41:55 AM »
anyone have?
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i.e. What exactly is a "MIDI port"?

i believe  that is relatively clear and needs no redefinition.

Quote
The fact that you can connect more than one UM880 or Opcode Studio is due to the interface's ability to combine and route all their data that presents to the computer as "one" device.

the main reason is the driver layout. some drivers are single client, others are not. for example the steinberg midex-8 usb supports 4 units in OS9 but only 2 in OSX.

Quote
There's also an issue with how many unique ports you can address at once which is where OMS and FreeMIDI come in but that's a different worm also.

that is the main bottleneck. what is been limited in OMS, will not be compensated by anything else.

Quote
Just because you can connect x number of ports at once doesn't necessarily mean you can really use them simultaneously.

such scenarios can happen, but i dont think it would be the wanted behavior. both serial and usb are fast enough to support 8-16 ports (most interfaces only have about 8 ports) and the buffer in the midi interface is also per port.

the ability of the most receiving devices and of the midi protocol itself should be always lower than the other side (computer & co)

OMS itself uses internally codenames for the first 24 ports which are going from a-z (excl the IACs and virtual IOs from apps). but it supports far more than 24 ports. i just dont know how many, that information seems to be missing in the manual.

i´d also like to know how to adress the port coming after z from an app.
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i understand its not as simple as it sounds to ask the question;
trust me ;)
im just seeking definitive answers (backed up by referencable sources)
for my own info and to be able to answer the question authoritatively (ha!)
in the future;

you know; basically desiring "The truth" to be able to "know what im talking about"
as much as humanly possible; lol!  ;D

I wonder if there are people out there with multiple Keyspan/megawolf Cards running
multiple AMT8/Unitor networks combined with MOTU MTP networks / Opcode 5LX Networks
id love to see someone post some crazy shit like that here (With pics + Video to back it up)
are u listening trent reznor? lol

<a href="http://www.youtube.com/watch?v=PTFwQP86BRs" target="_blank">http://www.youtube.com/watch?v=PTFwQP86BRs</a>
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but of course my question here + now is:
was MacOS8/9 able to have more than 32Midi Ports? (4 x 8 = 32)

the MOTU MIDI Timepiece manual also makes refernce to networking multiple MTPs of course; was that also up to a max of 4? if so why this max of 4? is there a real limit to the amount of MIDI ports a single mac can address? (32?)

The first thing you have to do to solve this is define terms.
i.e. What exactly is a "MIDI port"?
If we define a "MIDI port" as the actual 5-pin DIN connection (passing for the moment on USB and that whole world) we must remember that each instrument / device connected in this way may require two of them - 1 in, 1 out.
The Mac (and PCs too, for that matter) do not have "MIDI ports". They do have serial or parallel data ports that can be used to handle MIDI data, provided there is a suitable MIDI interface connected there.
These ports cannot be parallel combined or daisy-chained like SCSI so the maximum number of devices they can "see" is one per port. The fact that you can connect more than one UM880 or Opcode Studio is due to the interface's ability to combine and route all their data that presents to the computer as "one" device.

So, the number of interfaces that can be connected at once depends on the interfaces themselves and the maximum data handling capability of the computer and its port(s).
By that I mean: While MIDI interfaces such as Roland, Opcode or MOTU units can be stacked / combined in such as way as to create a LOT of MIDI ports, there is then a practical limit as to just how much data you can stuff through the serial computer port(s) at any one time. There's also an issue with how many unique ports you can address at once which is where OMS and FreeMIDI come in but that's a different worm also.
The total amount of MIDI data flowing to and from the computer at any given moment is of course, one bit…lol.
The total amount of MIDI data flowing to and from the computer at any given time is highly variable and depends both on:

1) The number of devices connected.
2) How many are active.
……and finally
3) How complex the data is.

Obviously, a simple say, drum pattern sends a LOT less data than a two-handed piano part or a complex synth part with continuous controllers and pitch bend. In a given sequence, the data rate varies constantly depending on the track count, music genre, types of instruments used and a dozen other variables.

Just because you can connect x number of ports at once doesn't necessarily mean you can really use them simultaneously.
There is a maximum amount of data you can pass and process in real time but there is no fixed number of ports that can "equal" that rate.
Opcode, for example, suggested you can stack six Studio Fives - two groups of three on each of two Mac serial ports for a total of ninety unique in/out MIDI pairs.*
Opcode also made a point that the MIDI data stream can easily get "clogged" at a certain (unspecified) point and may require "thinning" measures to be taken and/or the port data rate adjusted to keep things flowing because the serial port has a maximum transfer rate and the computer has a processing limit dependent on proc clock speed, software quality and a dozen other factors.

So…
There are no "official documents" or specs regarding this because of the infinite variations of individual setups. It like: how much traffic can you handle on a freeway? It depends on the speed limit, the types of vehicles (cars vs trucks) number of lanes etc etc. You can only estimate a nominal amount. Now, translate that to MIDI hardware / interfaces / ports. Opcode, for example, seemed to pick 6 x 15 = 90 total as a practical limit.

Conclusion: This is clearly a classic example of "Your mileage may vary"

*Each one of those can be theoretically multiplied by 16 channels for a total of 1440 addresses.
I seriously doubt anyone has a real use for that many destinations of that an OMS setup window or a SVP instrument window could be readable with that much content.

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The max 4 on MOTUs were not directly chained, that scenario is two separate chains of two, one to each serial/printer port.

I do not know of any actual practical limit... I know that the 15-port Opcode Studio 5LXs could be networked but I've no idea how many.
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