Cisco Cisco Unified MeetingPlace 8.6 快速安装指南
Customizing Music and Voice Prompts for Cisco Unified MeetingPlace
About Music and Voice Prompts
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Topics in this section include:
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Guidelines for Creating Custom Voice Prompts
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Recording environment—Make sure that the environment is extremely quiet. Do some sample
recordings beforehand, and listen to the results. The recorded passages should be free of hissing,
pops, frequency distortion, and other types of noise.
recordings beforehand, and listen to the results. The recorded passages should be free of hissing,
pops, frequency distortion, and other types of noise.
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Silence before and after each prompt—Each prompt should have between 50 to 100 milliseconds
of silence at the beginning and end. Too little silence creates pops when the prompt is concatenated
with other prompts (played just after or before other prompts). Too much silence creates awkward
gaps in overall speech when several prompts are played together. In some cases, 100 milliseconds
might not be enough to eliminate pops at the beginning and end of concatenated prompts. In this
case, try increasing the silence to 150 milliseconds. To measure the amount of silence at the
beginning or end of a prompt (or to see if there is silence), bring up the prompt in Adobe Audition
or a similar voice editing program. Open the file as a 16-bit, 8-kHz .wav or raw PCM file. Adobe
Audition allows accurate measurement of silences passages.
of silence at the beginning and end. Too little silence creates pops when the prompt is concatenated
with other prompts (played just after or before other prompts). Too much silence creates awkward
gaps in overall speech when several prompts are played together. In some cases, 100 milliseconds
might not be enough to eliminate pops at the beginning and end of concatenated prompts. In this
case, try increasing the silence to 150 milliseconds. To measure the amount of silence at the
beginning or end of a prompt (or to see if there is silence), bring up the prompt in Adobe Audition
or a similar voice editing program. Open the file as a 16-bit, 8-kHz .wav or raw PCM file. Adobe
Audition allows accurate measurement of silences passages.
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Format—Record all prompts in 8 kHz sample rate, u-law, WAV format. Any recording that is not
in this format must be processed in Adobe Audition or an equivalent audio editor to convert the
recording to the required 8 kHz, mu-law, WAV format.
in this format must be processed in Adobe Audition or an equivalent audio editor to convert the
recording to the required 8 kHz, mu-law, WAV format.
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Level—The average recording level for non-silence sections should be -24 dBm. Avoid very loud
recording levels because they can cause clipping, which creates clicks and pops in the middle of the
prompts.
recording levels because they can cause clipping, which creates clicks and pops in the middle of the
prompts.
Related Topics
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Guidelines for Creating Custom Music Prompts
Note
Because music prompts are subset of voice prompts, the
also applies to custom music prompts.
1495
3 minutes
Music heard by users in a waiting room.
1497
3 seconds
Welcome music heard by users who dial in.
Table 1
Music Prompt Numbers and Durations (continued)
Prompt
Number
Number
Approximate
Duration
Duration
Description