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49 Cards in this Set
- Front
- Back
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MIDI
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Musical Instrument Digital Interface
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THRU port
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Sends out a copy of info received @ the IN port
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Byte
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8 bits
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bit
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Binary Digit
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IN port
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Where device receives information
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OUT port
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Where device sends out the generated information
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MTC system message
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MIDI time code
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SPP system message
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Song position pointer
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Song Select system message
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allows segment or drum machine to change from one song to another remotely
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PPQ
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pulse per quarter note (minimum is 24)
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Hardware sequence Pros & Cons
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stand alone
stability & timing not expendable limited display |
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Software Sequence pros & cons
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run on host computer
storage display expandibiity can change interface not as stable more set up time |
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MIDI file
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-Common file format that is cross platform
-Saves only MIDI data |
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Multi-timbral
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Ability to play more than one sound at once
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Polyphony
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# of notes the device can play at one time
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Error floor
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Where digital control centre starts making mistakes
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Frequency
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How many bits per second
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Nyquist Theorem
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In order to record ∫ of F, we need a sample rate of at least 2F
To record 20 Hz need a sample rate of 40 Hz |
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Aliasing
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A spurious frequency caused by attempting to record a signal that is greater of the sample rate
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Anti-Aliasing filter
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Basically low pass filter so you dont get aliasing
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A to D conversion
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Amp ⇒
dithering ⇒ AAF ⇒ sample + hold ⇒ A to D conversion ⇒ multi-plexor ⇒ error correction ⇒ record modulation |
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AAF
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Anti-Aliasing Filter
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Dithering
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Small amount white noise added to signal to help avoid error floor
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Jitter
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A time-based error in digital audio
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AES or EBU
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Standard pro 2 channel digital audio transfer
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AES or EBU cable info
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XLR cable
Pulse code representing 1's and 0's 110 Ω 3-10 v max. length 100m/328 ft. uni directional |
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S/PDIF
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uses RCA
2 tracks/channel 75 Ω unidirectional 0.5 v 10 feet |
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lightpipe
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8 channel
uni-directional optical |
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Alesis
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Wordclock
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DAT
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2 chan
32, 44.1, 48k, SRS 16/24 bit |
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TDIF info
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25 pin
8 channel bi-directional tascom no clock |
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MLAN info
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yamaha IEEE
firewire 1394 word clock bi-directional 100 channel 256 MIDI ports |
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CD info
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2 channel
44.1 16 bit |
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ADAT info
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Alesis
8 channel 44.1/48k 16, 20, 24 bits SuHs tape (45 min) |
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DTRS
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Tascom
8 channel Hi-8 108 minutes 8 mm |
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DASH
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Digital Audio Stationary Head
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DASH info
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open reel
44.056 KHz used for video 16, 24, 48 tracks |
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4 Editing things to keep in mind
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- Try to make an edit at a zero crossing
- You can cut on any beat you wish but return on the same beat - Pay attention to tempo - Pay attention to sustaining sounds and reverb |
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Types of edits
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1) butt splice
2)cross fade |
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Butt splice
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hard cut
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Latency
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Time between when you ask computer for information and when you get it
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MME driver
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Multi-media extension (Windows, old, slow, 2 channel macs)
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WDM driver
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win driver model
Runs on Windows, 2 ch. out |
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ASIO driver
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Audio stream I/O, steinberg, mac & PC, supported by ProTools, multi-channel, low-latency
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GSIF driver
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Giga Sampler Interface Format
Tascam multi-channel PC only low latency |
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AU driver
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audio units
mac multi-channel |
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Firewire transfer max
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1934
400 Mb/s |
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USB 2.0 transfer max
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480 Mb/s
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USB 1.1 transfer max
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1.5 Mb/s (12 Mb/s)
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