What are the specs of the audio hardware on the 700 series?


This is a summary of the audio features supported by the model 715, 725,
735, and 755 workstations. The 705 and 710 also have audio, but the
specs
are not available. The 720, 730, and 750 models DO NOT have audio.

Audio features Programmable sample rates (kHz): 8, 11.025, 16,
22.05,32, 44.1, 48
Programmable output attenuation: 0 to -96 dB in 1.5 dB
steps
Programmable input gain: 0 to 22.5 dB in 1.5 dB steps
Input monitoring
Coding formats: 16-bit linear, 8-bit mulaw, or A-law

Audio inputs Line in
(not on all models) Mono microphone with 1.5V phantom power

(Editorial comment - a Sun microphone appears to work just fine.)

Audio outputs Line out
(not on all models) Headphone
Mono speaker jacks
Built-in mono speaker

Audio CODEC Crystal CS4215

Typical specifications measured on a stock 715. Values will differ only
slightly on other models.

Frequency response 25 - 20,000 Hz

Input Sensitivity/Impedance
Line In 2.0 V(pk) / 47 kohms
Microphone 22 mV(pk) / 1 kohm

Output Impedance (nominal)
Line out 619 ohms
Headphone 118 ohms
Speaker (ext) 11 ohms

Max Output Level/Impedance
Line Out 2.8 V (p-p) / 47 kohms
Headphone 2.75 V (p-p) / 50 ohms
Speaker (ext) 5.88 V (p-p) / 48 ohms

Signal to Noise
Line In 61 dB
Line Out 65 dB
Microphone 57 dB
Headphone 61 dB
Speaker (ext) 63 dB

THD (at nominal load)
Line In -75 dB
Line Out -73 dB
Microphone -73 dB
Headphone -70 dB
Speaker (ext) -68 dB



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