zen@utgpu.UUCP (03/19/87)
I was wondering if any problem existed with hooking up an audio
system to a Mac. I have been told that the resulting output wave is
too square and that clipping will result. Did Apple design the Mac
with hooking it into audio systems in mind?
Nick
--
Nick Zentena
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BITNET: zen@utorgpu.bitnet, zen@gpu.utcs.utoronto
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{utai,allegra,cbosgd,mnetor,pyramid}sjc@mips.UUCP (Steve Correll) (03/20/87)
In article <1987Mar18.175218.5438@gpu.utcs.toronto.edu>, zen@gpu.utcs.toronto.edu (Nick Zentena) writes: > I was wondering if any problem existed with hooking up an audio > system to a Mac. I have been told that the resulting output wave is > too square and that clipping will result... Yes, especially if you use the floppy port. :-) The amplifier which drives the Mac's speaker has enough power to drive a somewhat larger external speaker (I used one from a cheap portable phonograph), but not enough to drive the typical high fidelity bookshelf loudspeaker. You could connect it to an 'auxiliary' input (e.g. tape, cd, tuner, or 'spare') on your preamp or receiver, but the voltage is a bit high for most auxiliary inputs. I'd suggest putting a 1k ohm potentiometer (see Radio Shack) between the two, setting the preamp's volume control to its usual position, and adjusting the new potentiometer to give the desired volume: --------- + preamp (center pin) | v (center pin) Mac + ------oMWMWMWMWo---- - preamp | Mac - ---------------| If you have trouble with hum (I doubt you will), you need to use shielded cables and put the potentiometer in a metal box, with the box and the shields connected to the "-"s. Good luck.--Steve -- ...decwrl!mips!sjc Steve Correll
olson@endor.UUCP (03/24/87)
In article <979@mips.UUCP> sjc@mips.UUCP (Steve Correll) writes: >In article <1987Mar18.175218.5438@gpu.utcs.toronto.edu>, zen@gpu.utcs.toronto.edu (Nick Zentena) writes: >> I was wondering if any problem existed with hooking up an audio >> system to a Mac. I have been told that the resulting output wave is >> too square and that clipping will result... ... >(the) voltage is a bit high for most auxiliary inputs. I'd suggest putting a >1k ohm potentiometer (see Radio Shack) between the two, setting the >preamp's volume control to its usual position, and adjusting the new >potentiometer to give the desired volume: Radio Shack sells a cable intended just for this sort of connection. I believe it's called a "Mini phone plug to RCA attenuating cable". It's the appropriate cable to use to connect the headphone out of your TV to the Line In (or Aux, or Tape In) plug on your stereo. -Eric P.S. My first Mac (long gone now), which was a very early unit, had a RCA connector where the mini phone plug is on the current Mac. It even cut the sound to the internal speaker when you plugged something in! The signal levels, however, were the same as the current Mac.
pector@ihuxy.UUCP (03/25/87)
Has anyone noticed their MacPlus (NOT a FatMac 512K) making crackling and popping sounds while playing music in ConcertWare+MIDI using the 4 internal Mac voices? I have my Mac Plus's sound port connected to either my stereo system's preamp's aux port or connected to that for a Walkman type unit. When I had a 512K FatMac, there wasn't any such problem. Only since my upgrade to a MacPlus has there been any such noise in addition to the music. Scott Pector ihnp4!ihuxy!pector
brent@terra.UUCP (03/26/87)
In article <1914@ihuxy.ATT.COM>, pector@ihuxy.ATT.COM (Pector) writes: > Has anyone noticed their MacPlus (NOT a FatMac 512K) making crackling and > popping sounds while playing music in ConcertWare+MIDI using the 4 internal > Mac voices? ... Yes, just take a damp cloth and wipe the dust off the sound chip :-) Made in New Zealand --> Brent Callaghan @ Sun Microsystems uucp: sun!bcallaghan phone: (415) 691 6188