music tech comp 4 as Flashcards
XLR CABLE USE
used for microphones, mixers, amplifiers, soundboards
XLR BALANCED
XLR is balanced meaning it cancels out noise picked up by the cable run
(tip sleeve) TS JACK CABLE - how many wires, unbalanced + use
2 wires ground and hot, unbalanced, used for electric guitar and mono + unbalanced signals
( tip ring sleeve) TRS JACK CABLE - how many wires, balanced or stereo + use
3 wires, ground hot and cold. can be used as a balanced cable or a stereo connection
TRS CABLE USE
affix balanced equipment
if equipment is unbalanced and a TRS is used you will not get a balanced signal, combining left and right mono channels
WHAT HAPPENS TO A SOUND WHEN TRAVELLING THROUGH A BALANCED CABLE
- balanced cable contains 3 connections, hot + cold - and ground
- cold signal is polarity inverted version of that signal
- when signals reach destination the cold signals polarity inverts again
- polarity of both signals are the same, but the noise polarity is the opposite in the hot and cold signals
- the combination of the signals cancels out the noise and makes the signal twice as lound
MODULATION DEFINITION
something that changes the original sound or signal over time. Modulating a sound can add a sense of movement, add or change dimension, or create depth.
what does LFO stand for
Low frequency oscillator
what are the 3 factors of LFO
RATE - at which speed the modulation takes place e.g. 1/8 1/16 etc can be synced to bpm
DEPTH - how much the modulation affect the assigned element of the synthesiser
SHAPE - type of waveform used to modulate
How do synths use LFOs
LFOs are used to control different modules
DEFINITION OF TREMOLO
an effect that is created through modulation of volume
DEFINITION OF VIBRATO
an effect created through modulation of pitch
what is a HAMMOND ROTATING (Leslie speaker)
the Hammond rotating Leslie speaker is a combined amplifier and speaker that projects the signal of an electronic instrument and modifies the sound
when was the HAMMOND ROTATING (Leslie speaker) created
First one was created in 1941, Leslie should his business to BCS who then sold it to hammond in 1965
WHY WAS THE HAMMOND ROTATING (Leslie speaker) created ?
created to make the Hammond organ sound like a pipe or theatre organ
WHAT MICS DOES THE HAMMOND ROTATING (Leslie speaker) HAVE ?
- top mic. cardoid (condenser)
- bottom mic figure of 8 (ribbon)
HOW DOES THE HAMMOND ROTATING (Leslie speaker) WORK ?
has an external switch / pedal that can alternate between a slow and fast speed setting. this creates tremolo
- the tremolo is created by a baffle chamber rotating in the front of the loud speakers.
HOW TO RECORD A HAMMOND ROTATING (Leslie speaker) + difficulties
HOW
use mid side recording technique
- to capture the stereo width of the tremolo point the mics at the top of the speaker
DIFFiCULTIES
mid side recording technique could create difficulties as both mics are recording the same signal,
this could encounter phase issues
signals cancel out each other - when signal 1 is inverted in polarity and both signals are 180 degrees out of phase with each other this happens
