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Setting audio parameters

When using the –a_setting bitrate_samplerate_channel command, you must specify the audio bit rate, sample rate, and channel combination to apply to your content during the encoding process. Only a finite set of combinations is supported by the Windows Media Audio version 8 codec. Those combinations are provided in the table below. Each value in the string is separated by an underscore, in the form bitrate_samplerate_channel. The default value is 64_44_2.

String Bit rate (bps) Sampling rate Channels
192_48_2 192000 48000 2
160_48_2 160000 48000 2
128_48_2 128000 48000 2
192_44_2 192000 44100 2
160_44_2 160000 44100 2
128_44_2 128000 44100 2
96_44_2 96000 44100 2
80_44_2 80000 44100 2
64_44_2 64000 44100 2
48_44_2 48000 44100 2
32_44_2 32000 44100 2
48_44_1 48000 44100 1
32_44_1 32000 44100 1
48_32_2 48000 32000 2
40_32_2 40000 32000 2
32_32_2 32000 32000 2
20_32_1 20000 32000 1
32_22_2 32000 22050 2
22_22_2 22000 22050 2
20_22_2 20000 22050 2
20_22_1 20000 22050 1
16_22_1 16000 22050 1
20_16_2 20000 16000 2
16_16_2 16000 16000 2
16_16_1 16000 16000 1
12_16_1 12000 16000 1
10_16_1 10000 16000 1
10_11_1 10000 11025 1
8_11_1 8000 11025 1
12_8_2 12000 8000 2
8_8_1 8000 8000 1
6_8_1 6000 8000 1
5_8_1 5000 8000 1
0* 0 N/A N/A

* Use 0 when you want to encode only the video portion of your source.

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