Glossary: VCXO | Sweetwater.com

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VCXO: Abbreviation for Voltage Controlled crystal Oscillator. A VCXO is a type of oscillator used in many modern digital devices as a master clock source. Essentially it is a stable clock source (as you would expect from a crystal), but with an ability to have its rate "pulled" up or down by changes of input voltage. VCXO's provide manufacturers with a way to have a stable clock in their devices while still allowing them to be synchronized to an external clock source like word clock. This is often accomplished by using a PLL or Phase Locked Loop to compare the external clock to the output of the VCXO, which will generate a control voltage based on the difference. This voltage is used to vary the frequency of the crystal, thereby keeping it in sync with the external clock.

Vacuum Tube	Vako Orchestron	Valve
Vaporware	Variable Pattern Mic	Variable State Filter
Variac	Varispeed	Varitone
VAST	VBR	Voltage-controlled Amplifier (VCA)
VCA Group	VCF	VCO
VCR	VCXO	Velocity
Velocity Compression	Velocity Curve	Velocity Split
Veneer	Verse	VESA
VESA	VFO	VGA
Very High Frequency	Vibrato	Vibratone
Vibrato Tailpiece	Vibrola	Video Sync
Violin Bass	Virtual Analog Synthesizer	Virtual Dolby Digital
Virtual Dolby Surround	Virtual Instrument	VirtualMemory
Virtual Slave Reel	Virtual Track	VISE
VITC	Vivace	Virtual Network Computing
VOC	Vocal Booth	Vocoder
Voice	Voice-Stealing	Voice Coil
Voice Leading	Voice Over	Voicing
Volatile Memory	Volt	Volt-Ampere
Voltage	Voltage Clamping	Voltage-controlled Filter (VCF)
Voltage Depression	Voltage Regulator	Voltage Sag
Voltage Spike	Volume	Volute
Virtual Studio Technology	VST2	VST Instrument