Pro Speakers and Headphones Simultaneously?

10 replies [Last post]
alk's picture
alk
Offline
Joined: Dec 20 2003
Posts: 373

Does anybody know if it's possible to use the Pro Speakers jack and headphones/external speakers jack simultaneously without the Pro Speakers being cut off? I've got a G4 DA and would like to have both ports active at the same time.

A solution for OS X would be preferable, but I'm interested in OS 9 as well.

Any ideas?
Drew

__________________

Read the 5300 FAQ: http://www.alksoft.com/5300_FAQ/
Join the Resistance! Enlist in the PowerPC Macintosh Liberation Army!

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
TheUltimateMacUser's picture
Joined: Jan 28 2004
Posts: 615
fraid not

iirc there is no software solution as what you are describing is controleld by hardware. Oddly enough, my G4 outputs to all outputs regardless of what i have plugged in, via some fluke Tongue

__________________

<> AppleFritter Chat: #AppleFritter on irc.freenode.net <> Click here to join!

Dr. Webster's picture
Offline
Joined: Dec 19 2003
Posts: 1687
Rogue Amoeba's freeware Detou

Rogue Amoeba's freeware Detour (available at http://www.rogueamoeba.com/detour/legacy/) may do what you want, or at least get you close to a workable solution.

__________________

Applefritter Admin

TheUltimateMacUser's picture
Joined: Jan 28 2004
Posts: 615
:/

acatually, since (on the G4 at least) what your trying to do is wired into the hardware of the machine, im not sure Detour would do it. You could use detour to do what you want if you had a 2nd audio card tho Smile

__________________

<> AppleFritter Chat: #AppleFritter on irc.freenode.net <> Click here to join!

alk's picture
alk
Offline
Joined: Dec 20 2003
Posts: 373
Hardware

Are you sure it's in hardware? Do you have a dev note you can point to say that?

Stupid Apple has done things like this the hard way in the past where the headphones cut off the built-in speakers in SOFTWARE. For instance, if you load up a 7300 w/ BeOS, the built-in speaker doesn't turn off just because you plug in some headphones on the back of the Mac...

Peace,
Drew

__________________

Read the 5300 FAQ: http://www.alksoft.com/5300_FAQ/
Join the Resistance! Enlist in the PowerPC Macintosh Liberation Army!

coius's picture
Offline
Joined: Aug 25 2004
Posts: 1975
My AIO

under tiger does not recognize that something is being plugged into the front of it, and neither does the back plug. It's a software thing, I know that for sure. IIRC, no mac to this day uses a sound card. It's all done thru software as far as synthasizers

__________________

See my PB540c 33Mhz serve a website! http://yui-ikari.coius.info/

TheUltimateMacUser's picture
Joined: Jan 28 2004
Posts: 615
*shrug*

i stand corrected. i was told in the past that it could not be done, obviousily that person was mistaken.

__________________

<> AppleFritter Chat: #AppleFritter on irc.freenode.net <> Click here to join!

alk's picture
alk
Offline
Joined: Dec 20 2003
Posts: 373
The AIO FCP

The AIO Front Control Panel (FCP) is basically the same hardware as used in the 6500, 6400, and Performas as old as the 630. It is all software driven.

Who said anything about a "sound card?" Despite not having a complete daughtercard (PCI or otherwise) for performing a D:A audio conversion for the Apple sound system, Apple definitely DOES use audio hardware. Their hardware almost always consists of a unique Apple ASIC that does all the heavy lifting - something has to generate the sounds... The built-in sound is what I'm curious about, and I'd bet that Apple didn't use any easy or inexpensive method of cutting off sound when speakers are plugged in to the sound-out port (as opposed to the Apple Pro Speakers jack). They never do things the easy way when they can make it three times harder in software... :rolleyes:

The AIO info helps confirm what I've said about Apple's past engineering. They do things the hard way instead of the easy way... Still, the AIO's audio subsystem and the DA G4's audio subsystem are distinctly different beasts. Has anyone got any experience here with Linux on Macs that use the Pro Speakers jack? I wonder if that would give away the secret - is the cut-off software or hardware...

Peace,
Drew

__________________

Read the 5300 FAQ: http://www.alksoft.com/5300_FAQ/
Join the Resistance! Enlist in the PowerPC Macintosh Liberation Army!

alk's picture
alk
Offline
Joined: Dec 20 2003
Posts: 373
Detour

I'd try Detour (and I probably should just to put the question of hardware vs. software cut-off to rest), but it's definitely not freeware.

Quote:

Detour costs $12, with a fully-functional demo* available for download. A registration code can be purchased through our online store 24 hours a day. ...
*Before purchase, noise is overlaid on all processed audio after 20 minutes of redirecting.

Still, you're right. It might head me in the right direction. I'll give it a try and let you know what happens.

-
Drew

__________________

Read the 5300 FAQ: http://www.alksoft.com/5300_FAQ/
Join the Resistance! Enlist in the PowerPC Macintosh Liberation Army!

Offline
Joined: Dec 19 2003
Posts: 566
Re: Detour

alk wrote:

I'd try Detour (and I probably should just to put the question of hardware vs. software cut-off to rest), but it's definitely not freeware.

<...>

Still, you're right. It might head me in the right direction. I'll give it a try and let you know what happens.

-
Drew

Actually it is free now:

http://www.rogueamoeba.com/detour/

TOM

TheUltimateMacUser's picture
Joined: Jan 28 2004
Posts: 615
Pro

I did a little exparement for y'all. This is Detour, with both my Sony computer speakers plugged in, and my AApple Pro Speakers plugged in. there is no change from when the pro speakers are not plugged in. The pro speakers will not function unless i remove the sony's from the rear headphone jack. Detour does not differentiate between the pro jack and the regualr headphone jack. However, you can have regular speakers plugged into both the front and rear headphone jacks.

__________________

<> AppleFritter Chat: #AppleFritter on irc.freenode.net <> Click here to join!