Cisco Cisco TelePresence MCU 4510 Maintenance Manual
Customizing the user interface
Cisco TelePresence MCU Version 4.2 Printable online help
Page 243 of 252
Making the best possible recordings
There are many factors to consider when recording alternative voice prompts in order to get the best
results. Below is a summary of the points to bear in mind.
results. Below is a summary of the points to bear in mind.
Recording format
It is best to make each recording with the ideal settings and hence avoid any sample-rate or resolution
changes. As discussed, the ideal format is Microsoft Wave (.WAV) format, uncompressed, mono, at
16 kHz and 16-bit resolution.
changes. As discussed, the ideal format is Microsoft Wave (.WAV) format, uncompressed, mono, at
16 kHz and 16-bit resolution.
If you are unable to make mono recordings, the MCU can convert stereo recordings.
Background noise
It is important to minimize background noise (hiss) as much as possible. This includes ambient noises
such as road noise and slamming doors etc. but also try to keep fan noise and similar to a minimum.
such as road noise and slamming doors etc. but also try to keep fan noise and similar to a minimum.
When played back by the MCU, samples with background noise are very apparent.
Consistency
If possible, record all voice prompts in one session. This will ensure that all voice and background
conditions remain constant and the recorded voice will sound similar from prompt to prompt.
conditions remain constant and the recorded voice will sound similar from prompt to prompt.
Volume
Record prompts using a relatively constant loudness of voice. Although it may take some trial and
error, the best recordings will result from speaking loud enough that the voice is recorded loudly
compared to any residual background noise, but not so loudly that it sounds distorted when played
back.
error, the best recordings will result from speaking loud enough that the voice is recorded loudly
compared to any residual background noise, but not so loudly that it sounds distorted when played
back.