aud114 – wk6 – digital connections

ADC/DAC conversions slightly degrade signal each time it occurs.
All digital will maintain better quality.

digital transmission standards –
ADAT (optical) cable – transfers 8 tracks of multiplex signals interleaved down 1 cables (only one direction!) – developed by Alesis

SPDIF (AKA coaxial) – (sony/phillips digital interface) – carries 2 channels of multiplex digitl audio data one way – uses either RCA or optical connectors

AES/EBU or XLR – 2 channels multiplexed audio in one way on standard balanced cable

tdif – (tascam digital interface) – carries 8 channels but non-multiplexed digital data in 2 directions (not interleaved)

trs – stereo -3 pin xlr

ts – mono – 2 connector

Cables

connection

wk5- AUD114 – Digital & analog audio

Digital audio

transducer – mic is transducer

analog signal flow:
spl-mic-mic preamp-console-???- DAW

Analog to digital :
anything digital in signal flow requires processing

ADC/DAC process – anolog to digital or digital to analog
most digital audio devices have built in ADC/DAC’s (eg. rverb/fx unit/delay pedal,etc)

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why digital?

-its easier/convenient

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ADC
acts like transducer
translates electrically to numeric (1 and 0’s)

analog signal from mixer,mic preamp,etc – sampling – quantisation

sampling – taking portions
measuring analog signal voltage at various time intervals determines by sample rate
sample rates always in KHz
determines number of measurements taken of analog sig voltage/sec
(think of sample rate like camera pixels)

Nyquist frequency – highest freq an ADC can handle is = to half the sample rate (eg. 48khz would have Nf of 24khz)

alias frequency – incorrectly sample resulting in frequencies that were never there being heard in playback (form of distortion- not good)

anti-aliasing filter – most gear has built-in & will role of freq above selected khz (steep freq sound bad)
Oversampling – 1.OS on record 2. OS on playback (creates nicer sounding role off

*soundworks – sound of godzilla documentary 

quantisation –  making things in time/putting something on grid
involves amplitude
assigns binary number to each taken sample
ie. bit depth
bit is 1 or 0 (binary numbers) – basically on or off switch
eg. 16bit ADC would give 16 digit number to each sample taken
greater bit depth = more accurate

quantisation error – sample voltage unlikely to have precise binary value. gets rounded up or down to nearest quantisation value (changes waveform slightly)
lower signals suffer most of Q errors as less bit res is used (its rounded down)

Dither – filtered white noise – white noise = all freq played at same level
dither basically white noise cut around 1-5khz (hides form your ears)
dither reduces Quantisation error

‘what is PCM’ video

multiplexing –  making it interleaved
error processing signal flow

AUD114 – Wk2 – amps/re-amping/DI boxes

This week Rose took us into the studio and thoroughly went through the different effects and sounds you can get out of a guitar amp without needing any pedals (she used a VOX amp – i think).
We also broke down how the signal flow of re-amping practically works.
How the signal from a DAW can be sent back out into the live and into and amp and recreating the guitarists performance while having it sound exactly like its being played through.

Re-amping – Sending a recorded (DI’d) signal back through an amplifier and recording that.

DI Box – captures the impedance of a signal and keep that unaltered from the amp/other effects. *you can get a DI recording from anything with a 1/4 jack

Although I don’t know if I will remember how to do what was shown in class properly, I do think this will help with understanding the signal flow relative to the patch bay better.

Wk1- CIU111 Overview of Industry (a.k.a How not to be an Asshole)

This was my first class back  and the trimester assessments were discussed – the most daunting tasks for me are making a portfolio, talking to industry professionals and writing a resume/cover letter.

I feel both the quantity and quality of the things I’ve made is sub-par which gives me great hesitation in presenting them in a portfolio (as discussed in class~ the imposter syndrome appears). But having attempted to see this in the perspective of myself two years from now, I imagine I will probably be relieved to have started so far in advance.

It seems as though I will be creating a portfolio of things I don’t love. I don’t understand how I will contact industry professionals or what I will say/ask. I don’t know how to construct a resume for jobs in an industry I have never worked in.
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The assessments were discussed with particular emphasis on the concept of a  ‘Professional Narrative’

Professional – having skills that match the abilities of a person who earns money from the thing.

Narrative – The composition/curation of a story (not always linear) as a opposed to a ‘story’ being a sequence of related events told in order.

Professional Narrative – How to curate your abilities and skills to hopefully get paid for it one day…

Professional Narratives seem to be crucial for people working/wanting to work within media/arts industries. How an individual is presented can heavily affect their employability. From this, I take the most important things in creating an employable professional identity are the strength of the portfolio, ability to network and adaptability.
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The R’s of reflective blogging:

• Reporting: What was said?
• Relating: Do you agree with it? Do you disagree with it? Why? What does it mean to you?
• Reasoning: What do people on the Internet say? How does their perspective affect your own? Why?
• Reconstructing: Where do you go from here? What has changed? What have you learned?

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*Things to note:
-Don’t be late or an asshole
-Aaron really likes Carly Rae Jepsen & David Lynch