The future is Timecode
Control Vinyl or TimeCode is a specially recorded vinyl which is
played on conventional turntables. The vinyl is a recording of analog audio
signals often referred to as timecode. The turntables' audio output - the
timecode recording - is routed into an analog-to-digital converter, or ADC.
This ADC may be a multi-channel soundcard or a dedicated
external USB or firewire audio interface box, DJ controller device or
compatible mixer (usually distributed with the software). The ADC sends digital
time code information to the software, which then translates the signal into
corresponding changes in the playback speed, direction and position of a
digital audio file.
The audio file will react as if were pressed directly onto the
record. The manipulated audio output of the program is then sent back through
the DAC or the computer's sound card, and can be routed into an audio mixer
where it can be mixed like any other analog audio signal.
the way you want
The result is digital audio playback that sounds like music
manipulated by an analog vinyl recording. However, there is always a short
delay between the needle's reading of the time code and the software's playback
of the audio. The delay time is treated as a figure of merit for vinyl
emulation products. A shorter delay allows the DJ to have better response and
control of the music and is usually not noticeable by the user or listener. The
Traktor Control Vinyl MK2 features the lowest latency in the range.