5 Replies Latest reply: Jan 23, 2007 1:10 PM by Jim Stembridge
Peter Dobkin Hall Level 1 Level 1 (30 points)
I was recently given a Boston Audio Digital BA735 speaker system. Although my G5 system profiler says the machine has a built-in digital audio card, I can't get it to work. I have tried changing the sound command in system proferences to digital, but to no avail.

G5 Powermac, Mac OS X (10.4.7)
  • 1. Re: connecting digital speakers
    DaddyPaycheck Level 6 Level 6 (16,035 points)
    Peter Dobkin Hall-

    How do the speakers interface to the G5? Are you using the correct port?

    Luck-

    -DaddyPaycheck
  • 2. Re: connecting digital speakers
    Peter Dobkin Hall Level 1 Level 1 (30 points)
    The speakers connect with a phone jack rather than toslink connectors. Could this be the problem?

    Am I correct in assuming that the optical video port is the only one that will interface with digital speakers?

    As noted, I do appear to have a digital audio card. Here's the info on it:

    Built In Sound Card:

    Devices:
    Burr Brown PCM3052:
    Inputs and Outputs:
    Line Level Input:
    Controls: Mute, Master
    Playthrough: No
    PluginID: Onyx
    S/PDIF Digital Output:
    Controls: Mute
    PluginID: Onyx
    Headphones:
    Controls: Mute, Left, Right
    PluginID: Onyx
    Internal Speakers:
    Controls: Mute, Master
    PluginID: Onyx
    Line Level Output:
    Controls: Mute, Left, Right
    PluginID: Onyx
    Formats:
    PCM 16:
    Bit Depth: 16
    Bit Width: 16
    Channels: 2
    Mixable: Yes
    Sample Rates: 32 KHz, 44.1 KHz, 48 KHz, 64 KHz, 88.2 KHz, 96 KHz
    PCM 24:
    Bit Depth: 24
    Bit Width: 32
    Channels: 2
    Mixable: Yes
    Sample Rates: 32 KHz, 44.1 KHz, 48 KHz, 64 KHz, 88.2 KHz, 96 KHz
    AC3 16:
    Bit Depth: 16
    Bit Width: 16
    Channels: 2
    Mixable: No
    Sample Rates: 32 KHz, 44.1 KHz, 48 KHz, 64 KHz, 88.2 KHz, 96 KHz
  • 3. Re: connecting digital speakers
    maclover Level 4 Level 4 (3,855 points)
    Hi Peter, and a Warm Welcome to the Power Mac G5 Forum!

    You are correct.

    The G5 outputs an analogue stereo audio signal to the rear 3/16" (3.5mm) audio-out socket - and a digital stereo signal (which can carry 5.1 surround-sound information from DVD Player) to the rear optical audio-out port.

    Those speakers seem originally to have been bundled with a Gateway PC with a digital sound card with suitable digital, but not optical, outputs. It looks as though they won't work with the analogue stereo output socket of the G5

    http://www.bostonacoustics.com/tecmultimediafaq.aspx#2

    You could probably find a PCI digital audio card with suitable non-optical output - but it might be easier to get either analogue stereo 2.1 speakers or digital 5.1 speakers with optical input.
  • 4. Re: connecting digital speakers
    maclover Level 4 Level 4 (3,855 points)
    Hmm. Make that 1/8" not 3/16" - you can tell we're Metric here...
  • 5. Re: connecting digital speakers
    Jim Stembridge Level 2 Level 2 (170 points)
    Hey there, I have a 2003 G5 Dual 2 GHz and just recieved a set of these as well - BA735 Digital. I had a Dell several years ago that had a sound card with a mini jack for the digital out. The G5 only has the toslink output for digital. So unless you have a PC with a digital sound card output in mini jack form, this is a paperweight. I bought a set of Altec Lansing with that Dell and they have both digital (like the BA735) and analog inputs. It's a shame that the Boston Acoustics version has no analog input.

    Is there any "adapter" for toslink to minijack?