1027Re: [SpectrumLabUsers] Re: Running Spectrum Lab in 'debug' mode
- Oct 27 2:01 PMOn Sat, 27 Oct 2012 13:17:11 -0700, john_s_colton <john_colton@...>
> I've got a microphone input, but since I was interested in using thisJohn, according to my research the Optiplex 990 uses a Realtek ALC269 chip
> particular computer just for the function generator capability of
> Spectrum Lab (audio output only), I don't have any microphone currently
> hooked up. Are you saying that I cannot use SL as a function generator
> to produce audio if I don't have any audio inputs? That seems odd.
> Anyway, I will try to track down a microphone to make sure that the
> microphone input on this computer actually works (I've never use it
> yet), and assuming it does I'll see if SL functions with the microphone
for its audio functions. You can read a short description of it here:
basically it says ....
The ALC269 is a High Definition Audio Codec that integrates a 2+2-channel
DAC, a 4-channel ADC, and a Class-D Speaker Amplifier.
The 2+2-channel DAC supports two independent stereo sound outputs
simultaneously. The 4-channel ADC integrates two stereo and independent
analog sound inputs (multiple streaming).
The ALC269 incorporates Realtek converter technology to achieve a 98dB
dynamic range playback quality and a 98dB dynamic range recording quality.
It meets the current WLP3.10 (Windows Logo Program) and future WLP
The ALC269 also supports stereo digital microphone channels (microphone
array) with Acoustic Echo Cancellation (AEC), Beam Forming (BF), and Noise
Suppression (NS) technology simultaneously, significantly improving voice
quality for PC VoIP applications.
As well as basic audio functions, the ALC269 has two independent S/PDIF
outputs; one could be used to connect a PC to high-quality consumer
electronic products such as digital decoders and speakers, the other could
provide a dedicated digital output to a HDMI transmitter (common in high
There are three integrated power amplifiers. The first is a linear
headphone amplifier at port C. The second headphone amplifier at port A
removes the need for external DC blocking capacitors, eliminating pop
noise caused by these capacitors. The third is an integrated stereo
Class-D amplifier to directly drive a mini-speaker. The Class-D amplifier
is designed to drive speakers with as low as 4Ω impedance. Its maximum
output power is 2.3W per channel at 5V power supply. The advantage of an
integrated Class-D amplifier in the ALC269 is high efficiency with low
The ALC269 integrates five hardware equalizer bands composed of one
low-pass filter, one high-pass filter, and three band-pass filters to
compensate for mini-speaker frequency response. All the equalizer filters
are programmable via the BIOS, allowing the equalizer to function without
the need to customize the audio driver.
The data sheet is also linked on the page.
There are 4 models of the 990 and it appears they all have expansion slots
that would allow adding a sound card.
here is a link to the desk top version
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