General Use

5.4.3AAC-LD 128kbps (stereo audio)

Specify a call rate for 128kbps AAC-LD. From this call rate and above, "128kbps AAC-LD" is available. On lower call rates "64kbps AAC-LD" is available.

Stereo audio requires twice the bandwidth as mono CD-quality audio. Therefore we recommend to enable stereo audio on high call rates only. To enable stereo CD-quality audio you need to specify a call rate for when stereo automatically should be enabled. On lower call rates, mono CD-quality audio "64kbps AAC-LD" will be enabled. Stereo Input mode needs to be enabled to get stereo audio, see Stereo Settings for details.

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TANDBERG 990 MXP, 880 MXP, 770 MXP user manual AAC-LD 128kbps stereo audio