Recording a Human Audio

Professional recording devices (recommended: Adobe Audition) are preferred for audio recording.

If professional recording devices are not available, you can use your mobile phone for recording. See Recording an Audio on a Mobile Phone.

• Try to record the audio in a quiet environment without echo, reverberation, and noises caused by car horns, talking, or walking.
• You can use the decibel (dB) meter app to test the background noise in the recording environment. The background noise should be lower than 0 dB.
• The recording device and environment cannot be changed for the same recording task.

You are advised to use Script Examples (Advanced Edition).

You can also customize the script. The length of one phrase must be the same as that in the example.

Improvised recording is not recommended as there may be too many fillers that compromise the speech coherence.

Distance from the microphone

Adjust the distance from the microphone. The one-punch distance is appropriate. To avoid pop sound effects or recording the breath sound, do not be too close to the microphone.

Recording content

The starting number of each piece of script does not need to be read.

For example, for the script "4. It features a multitude of functions and superior performance", 4 does not need to be read.

Audio format

Save the audio file in a lossless format, such as WAV and MP3.

The recording data should not be encoded (sample rate of 48 kHz, sample bit of 16 bits, and mono).

Speech style

Keep the speech style consistent throughout the recording to avoid excessive emotions.

Pronunciation

Pronunciation should be clear and accurate, and the volume should be moderate. If there is undesired sound, record the phrase again.

Speed and rhythm

The speed of speech should be natural and stable. Do not be too fast or too slow.

Moderate volume

The volume cannot be too low or too high, or fluctuate. Clipping noise is not allowed.

Pause

Pause naturally and breathe softly upon punctuations and appropriate positions.

There must be a pause of 2–3 seconds between phrases for a long audio file.

Accent position

Find the correct accent position to avoid wrong accent.

Reading pronunciation

Read in order, ensure the phonetic consistency (avoid missing or adding words), and avoid wrong pronunciation. If there is a misreading or the reading is not smooth, record the whole phrase again.

Content

Merging several audio files into one audio file for training will fail the review.