SCC Commercial Audio Classes - Susan Pankratz, Instructor

Welcome to my SCC Main Page.
Last updated 8/26/08. This webpage is revised frequently - check often for updates.

My email is PankraS@scc.losrios.edu My VoiceMail is: 568-3100 ext. 13234 (I check my email more often)
URL of this page: http://wserver.scc.losrios.edu/~pankras/index.html
SCC Application Audio Production Certificate/Degree Computer access at LRC Staff and Faculty contact, etc. info Class calendar (holidays, finals, etc.) Fall '08 Finals Schedule

Attendance and Homework are 45% of your grade! Homework will be corrected and returned, but not graded.
Due dates for homework and take-home quizzes are final - no late work accepted.
If you cannot return an assignment to me at classtimes, you may leave it in my box in the HFA office (A19) - you must call or email me to let me know it is there, or you will not receive credit for having turned it in on time / at all.

Live Sound Reinforcement MUSM 306 Studio Recording Techniques MUSM 342 Certified Pro Tools Classes at SCC (Will actually be 3 classes on version 7; catalog doesn't reflect change yet)

Some of what's on this page:
SCC Audio Gear
Decibel exposure time guidelines, Hearing protection for musicians
Decibels, dbu, dbV, dbv, etc explained
Reference/Resource Pages
Other Online Docs
More links to Audio Websites
Map of the SCC Auditorium (Music) Bldg
Fundamental Frequencies of Piano, Bass and Guitar
Free Magazine subscriptions

Info/Manuals, data sheets for some SCC Sound Gear:
  Mac's and Digidesign gear used for certified Pro Tools classes 101, 110 and 201, version 7:
     1.8GHz PowerPC G5s, 1GB RAM, 900MHz Bus, 512K L2;
      single CPU for LE with Mbox systems, double CPU for HD 2 Accel TDM system
      Versions changing over the summer - TBA
      Altiverb, Waves Platinum Bundle and Bomb Factory on TDM system
     Digidesign Control|24
     Digidesign D-Command
     Digidesign 192 I/O
     Digidesign PRE
     Digidesign SYNC I/O
  Otari Sound Workshop Series 54 32-channel mixer Channel I/O block diagram Left Channel I/O block diagram Right
  Otari MX-80 2-inch 24-track tape machine
  Otari CB-140 Remote Controller and CB-120 Auto Locator
  Meyer HD-1 Near-field Studio monitors
  Meyer 833 Studio Reference monitors: Datasheet, Manual
  Meyer 834 Studio Subwoofers: Datasheet
  Meyer MS100A Stereo Amplifier
  Meyer CP-10 Parametric EQ
  AKG C1000S condenser mic
  AKG C414B-ULS condenser mic
  AKG C460B condenser mic with AKG CK61 capsule
  Shure SM81 condenser mic
  Crown SASS-P stereo mic
  Crown PZM30R boundary mic
  Shure SM57 dynamic mic (instruments)
  Shure SM58 dynamic mic (vocals)
  Shure Beta 57A dynamic mic (instruments)
  Shure Beta 58A dynamic mic (vocals)
  Sennheiser MD421 II dynamic mic (we have originals, very similar) PDF Spec
  AKG D112 large diaphragm dynamic mic (kick drum)
  Countryman Type 85 direct box (DI) data sheet   application notes
  Stewart ADB-1 direct box (DI) (not much here)
  Furman PL-Plus Power Conditioners
  dbx 166 Comp/Limiter/Gate
  Lexicon PCM70 Digital Effects Processor
  Lexicon LXP-5
  Klark-Teknik DN 410 Dual Parametric Equaliser
  Symetrix 564E Quad Expander/Gates
  Aphex Expressors
  Aphex Expander/Gate
  Aphex Aural Exciter Type III
  BBE Sonic Maximizer 822A
  Eventide H3000 SE Ultra-Harmonizer Search Eventide KnowledgeBase Usage Tips
  Mackie Analog 8•Bus Mixer
  Mackie Analog 8•Bus Block Diagram on page 5
  Behringer Powerplay Pro-8 HA8000 Headphone Amp
  Panasonic SV-3700 DAT Deck
  Adams-Smith Zeta-Three Synchroniser
  Yamaha CDX-480 CD Deck
  Tascam 122 MkII Cassette Recorder

For use by musicians:
  Fender Twin Reverb amplifiers
  Genz-Benz bass amp
  Ampeg bass amp
  Yamaha drum set
  Latin Percussion congas
  Marshall 4-input keyboard amp

Gear in Rm A27:
  Yamaha AVS-700 AudioVideo Selector
  Yamaha Q2031 double 31-band EQ
  JVC HR-S4800U VHS
  Sony DVP-NS500V CD/DVD/SACD Player
  Yamaha KX 150 Cassette
  Sony PS-7FLII Turntable
  Rane AC22 Crossover
  JBL SR4718 subwoofer

  SCC's Live Sound Gear

Useful Reference/Resource Pages:
Mackie Glossary
Rane Pro Audio Glosssary/Dictionary/Reference
The EV PA bible on ProSoundWeb
Rane Library: Tutorials
Some good articles about church sound (and fixed installations in general)
Dictionary of electrical terms for the sound engineer

Theatrical Sound Engineering - an intro
W.A.M. Women's Audio Mission
Alternative Careers for Sound Engineers
Audio Product & Resource Listings
Educational "Links We Like" from Digidesign Support

Caig De-Oxit - contact cleaner and de-oxidizer

Other Online Docs for gear:

(I've got boatloads of other links - please ask...)

Pages w More links to Audio Websites:
Hyperreal Manufacturers Links
AES Audio and Music Related WWW Links

Please let me know if any links don't work or have died. I run a linkchecker regularly, but some websites seem to get 'redecorated' constantly...

Decibel Exposure Time Guidelines
Accepted standards for recommended permissible exposure time for continuous time weighted average noise, according to NIOSH and CDC, 2002. For every 3 dBs over 85dB, the permissible exposure time before possible damage can occur is cut in half.

Continuous dB	Permissible Exposure Time
85 db	8 hours
88 dB	4 hours
91 db	2 hours
94 db	1 hour
97 db	30 minutes
100 db	15 minutes
103 db	7.5 minutes
106 dB	3.75 min
109 dB	1.875 min
112 dB	.9375 min (~1 min)
115 dB	.46875 min (~30 sec)

vs.
(Sigh) From OSHA website:

90db	8 hours
93db	5.3 hours
96db	3.5 hours
99db	2.3 hours
102db	1.5 hours
105db	1 hour
108db	0.66 hour (40 minutes)
111db	0.44 hour (26 minutes)
115db	0.25 hour (15 minutes)
118db	0.16 hour (10 minutes)
121db	0.11 hour (6.5 minutes)
124db	0.072 hour (4 minutes)

H.E.A.R. Hearing Education and Awareness for Musicians
Etymotic ER-20 Earplugs docs
Etymotic ER-20 Earplugs for $12: 12-20db drop, fairly flat.
vs
Sonic II earplugs: great for gunshots, not flat at all.
Newsweek story about hearing loss among musicians, etc.

Decibels and their variations (dBv, dBu, dBV, dBm):
Explanations in increasing level of complexity:
http://www.soundonsound.com/sos/1994_articles/feb94/decibels.html
http://stason.org/TULARC/entertainment/audio/pro/3-3-What-is-the-difference-between-dBv-dBu-dBV-dBm-dB.html
http://emusician.com/tutorials/emusic_decibels_demystified_part/
http://en.wikipedia.org/wiki/Decibel

Calculator that converts between db versions:
http://www.analog.com/Analog_Root/static/techSupport/designTools/interactiveTools/dbconvert/dbconvert.html

Map of the SCC Auditorium (Music) Bldg (it's a maze)

Free Magazine subscriptions
Free subscription to TapeOp
Free subscription to Pro Audio Review

1 rackspace = 1U = 1.75inches = 44.45mm

Search the audio newsgroups archives at google (enter "*audio*" in the "newsgroups" field).

Audio Engineering Society (AES)

Technical Standards publications of interest to audio engineering:
Audio Engineering Society (AES)
Acoustical Society of America (ASA)
International Electrotechnical Commission (IEC)
International Organization for Standardization (ISO)
International Telecommunications Union (ITU)

Fundamental Frequencies of Piano

Courtesy of Vibrationdata.com
Piano Page

PIANO KEYBOARD

The number beside each key is the fundamental frequency in units of cycles per seconds, or Hertz.

OCTAVES

For example, the A4 key has a frequency of 440 Hz.

Note that A5 has a frequency of 880 Hz. The A5 key is thus one octave higher than A4 since it has twice the frequency.

OVERTONES

An overtone is a higher natural frequency for a given string. The overtones are "harmonic" if each occurs at an integer multiple of the fundamental frequency.

Fundamental Frequencies of notes on Guitar and Bass Guitar in Hz (261.63 is middle C on a piano)

Guitar

	E	A	D	G	B	E
0 (open)	82.41	110.00	146.83	196.00	246.94	329.63
1	87.31	116.54	155.56	207.65	261.63	349.23
2	92.50	123.47	164.81	220.00	277.18	369.99
3	98.00	130.81	174.61	233.08	293.66	392.00
4	103.83	138.59	185.00	246.94	311.13	415.30
5	110.00	146.83	196.00	261.63	329.63	440.00
6	116.54	155.56	207.65	277.18	349.23	466.16
7	123.47	164.81	220.00	293.66	369.99	493.88
8	130.81	174.61	233.08	311.13	392.00	523.25
9	138.59	185.00	246.94	329.63	415.30	554.37
10	146.83	196.00	261.63	349.23	440.00	587.33
11	155.56	207.65	277.18	369.99	466.16	622.25
12	164.81	220.00	293.66	392.00	493.88	659.26
13	174.61	233.08	311.13	415.30	523.25	698.46
14	185.00	246.94	329.63	440.00	554.37	739.99
15	196.00	261.63	349.23	466.16	587.33	783.99
16	207.65	277.18	369.99	493.88	622.25	830.61
17	220.00	293.66	392.00	523.25	659.26	880.00
18	233.08	311.13	415.30	554.37	698.46	932.33
19	246.94	329.63	440.00	587.33	739.99	987.77
20	261.63	349.23	466.16	622.25	783.99	1046.50
21	277.18	369.99	493.88	659.26	830.61	1108.73
22	293.66	392.00	523.25	698.46	880.00	1174.66

Bass Guitar

	E	A	D	G
0 (open)	41.20	55.00	73.42	98.00
1	43.65	58.27	77.78	103.83
2	46.25	61.74	82.41	110.00
3	49.00	65.41	87.31	116.54
4	51.91	69.30	92.50	123.47
5	55.00	73.42	98.00	130.81
6	58.27	77.78	103.83	138.59
7	61.74	82.41	110.00	146.83
8	65.41	87.31	116.54	155.56
9	69.30	92.50	123.47	164.81
10	73.42	98.00	130.81	174.61
11	77.78	103.83	138.59	185.00
12	82.41	110.00	146.83	196.00
13	87.31	116.54	155.56	207.65
14	92.50	123.47	164.81	220.00
15	98.00	130.81	174.61	233.08
16	103.83	138.59	185.00	246.94
17	110.00	146.83	196.00	261.63
18	116.54	155.56	207.65	277.18
19	123.47	164.81	220.00	293.66
20	130.81	174.61	233.08	311.13
21	138.59	185.00	246.94	329.63
22	146.83	196.00	261.63	349.23

credit: http://www5.ocn.ne.jp/~dgb/index_e.htm

"Allegro Audio" my personal audio webpage

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Courtesy of Vibrationdata.com Piano Page PIANO KEYBOARD