1Khz is equivalent to 4 p.p.m (Peak Programme Metre) and -18dBVU (decibels and virtually useless)
They can be measured in PPM’s and VU. PPM’s move side to side and VU are coloured and move up.
On board mic (on camera) – Left Channel – Room. Boom mic – Right Channel – Voice – Ambient sound and as a back up if a channel fails.
Wildtrack – the ambient sound of the room. You need to record 1 minute of wild track.
Wildtrack needs to be recorded to avoid hard cuts in the audio.
Sound FX – 3.5 PPM
Music – 4.5 PPM
Voice – 6PPM (5.5PM and adverts go up to 6PPM)
The sound is compressed between 4ppm and 6ppm between a limiter in commercials. That’s why people sound different in TV programmes and music as they do live.