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