TL Audio VP-1 - Manual (Page 4)

An expander/gate circuit is also included in the VP-1. The circuit provides variable
threshold and attack and release times, and includes a four segment LED bargraph to
indicate the gain reduction that is being applied.
De-essing of vocal sources is provided, with the depth (i.e. attenuation) of the de-
essing variable, along with frequency and bandwidth tuning to match the sibilant
content of the signal. This section also includes a four segment LED bargraph to
indicate the gain reduction that is being applied.
A comprehensive hybrid-valve compressor which can operate in either
transconductance mode (“voltage controlled resistance”) or optical mode (“light
dependent resistance”) is available to tailor the signal dynamics. The two modes each
provide effective compression, but with subtly different characteristics which may
suit particular source material. Hard or soft knee and optional hold switching further
augment the fully variable threshold, ratio, attack, release and gain make-up.
The VP-1 includes a four band equaliser, which utilises four triode valve stages. The
EQ may be switched to pre or post the compressor. The LF and HF bands are shelving
and feature switched frequencies, whilst the LM and HM bands are fully parametric
peaking stages with variable frequency and bandwidth. All bands have +/-15dB of cut
and boost.
The master level control is a large rotary fader, providing up to 15dB of gain. An
optical limiter with variable threshold and LED indication prevents the following
equipment from being overdriven by the VP-1.
Line level outputs are provided at +4dBu nominal level via a balanced XLR
connector, and at -10dBu nominal level via an unbalanced jack socket. An optional
digital output module is available for the VP-1, providing various output formats,
word lengths and sampling rates.
The VP-1 metering consists of an illuminated moving coil VU meter which can
display input level, output level or compressor gain reduction. In addition, a variable
intensity yellow “drive” LED indicates the signal level through the valve stages, and a
red “peak” LED monitors the headroom remaining on the input and post processed
signals.
Please read this manual fully before installing or operating the processor.