MOS Technology 6581 (English Wikipedia)

"6581 Sound Interface Device (SID) Chip Specifications". Commodore 64 Programmer's Reference Guide (PDF) (1 ed.). Wayne, Pennsylvania: Commodore Business Machines, Inc. 1982. p. 457. ISBN 9780672220562. Archived (PDF) from the original on 2019-07-05. Retrieved 2019-07-05.

cnn.com (Global: 28^th place; English: 26^th place)

edition.cnn.com

Griggs, Brandon (2011-05-09). "The Commodore 64, that '80s computer icon, lives again". CNN. Archived from the original on 2019-07-04. Retrieved 2014-11-17.

codebase64.org (Global: low place; English: low place)

Alstrup, Asger (2015-04-17). "Examination of SID noise waveform". SID - Sound & Music. Codebase64. Archived from the original on 2019-07-04.

csdb.dk (Global: low place; English: low place)

Mixer; SounDemoN; The Human Code Machine (2008-10-29). "Vicious Sid (2008)". Commodore 64 Scene Database. Archived from the original on 2019-07-04.

doi.org (Global: 2^nd place; English: 2^nd place)

Perry, Tekla S.; Wallich, Paul (March 1985). "Design case history: the Commodore 64" (PDF). IEEE Spectrum. 22 (3). IEEE: 48–58. doi:10.1109/MSPEC.1985.6370590. ISSN 0018-9235. S2CID 11900865. Archived from the original (PDF) on 2019-07-04. Retrieved 2011-11-12.

ghostarchive.org (Global: 32^nd place; English: 21^st place)

Archived at Ghostarchive and the Wayback Machine: Replica Sound Cards - AdLib, Innovation SSI-2001, and SwinSID Ultimate., 9 July 2018, retrieved 2019-08-01

github.com (Global: 383^rd place; English: 320^th place)

LouD (2025-08-28), LouDnl/USBSID-Pico, retrieved 2025-08-29

ieee.org (Global: 652^nd place; English: 515^th place)

spectrum.ieee.org

Perry, Tekla S.; Wallich, Paul (March 1985). "Design case history: the Commodore 64" (PDF). IEEE Spectrum. 22 (3). IEEE: 48–58. doi:10.1109/MSPEC.1985.6370590. ISSN 0018-9235. S2CID 11900865. Archived from the original (PDF) on 2019-07-04. Retrieved 2011-11-12.

kevtris.org (Global: low place; English: low place)

Horton, Kevin. "Remarked SID Chips Sold as New". SID. Archived from the original on 2019-07-04.

mssiah.com (Global: low place; English: low place)

"MSSIAH Cartridge - MIDI Hardware and Software for the Commodore 64!". www.mssiah.com.

oth4.com (Global: low place; English: low place)

sid.oth4.com

"The SID 6581/8580 Recordings Archive". jme. Archived from the original on 2019-07-04.

oxyron.de (Global: low place; English: low place)

Graham (2014). "SID 6581/8580 (Sound Interface Device) reference". 8 bit IC register reference. Oxyron. Archived from the original on 2019-07-04.

polynominal.com (Global: low place; English: low place)

"Commodore 64 SID chip".

semanticscholar.org (Global: 11^th place; English: 8^th place)

api.semanticscholar.org

Perry, Tekla S.; Wallich, Paul (March 1985). "Design case history: the Commodore 64" (PDF). IEEE Spectrum. 22 (3). IEEE: 48–58. doi:10.1109/MSPEC.1985.6370590. ISSN 0018-9235. S2CID 11900865. Archived from the original (PDF) on 2019-07-04. Retrieved 2011-11-12.

sourceforge.net (Global: 1,669^th place; English: 1,290^th place)

sourceforge.net

kenchis. "Java SID Player Music Library V2". SourceForge. Archived from the original on 2019-07-05. Retrieved 2019-07-05.

psid64.sourceforge.net

rolandh. "PSID64". SourceForge. Archived from the original on 2019-07-05. Retrieved 2019-07-05.

ucapps.de (Global: low place; English: low place)

Klose, Thorsten (2019-05-24). "MIDIbox SID V2 - User Manual". MIDIbox Projects. Archived from the original on 2019-07-04. Retrieved 2019-07-04.

uwaterloo.ca (Global: 3,153^rd place; English: 2,332^nd place)

ist.uwaterloo.ca

"MJK's Commodore Hardware Overview: Commodore 64".

web.archive.org (Global: 1^st place; English: 1^st place)

"6581 Sound Interface Device (SID) Chip Specifications". Commodore 64 Programmer's Reference Guide (PDF) (1 ed.). Wayne, Pennsylvania: Commodore Business Machines, Inc. 1982. p. 457. ISBN 9780672220562. Archived (PDF) from the original on 2019-07-05. Retrieved 2019-07-05.
Griggs, Brandon (2011-05-09). "The Commodore 64, that '80s computer icon, lives again". CNN. Archived from the original on 2019-07-04. Retrieved 2014-11-17.
Perry, Tekla S.; Wallich, Paul (March 1985). "Design case history: the Commodore 64" (PDF). IEEE Spectrum. 22 (3). IEEE: 48–58. doi:10.1109/MSPEC.1985.6370590. ISSN 0018-9235. S2CID 11900865. Archived from the original (PDF) on 2019-07-04. Retrieved 2011-11-12.
Klose, Thorsten (2019-05-24). "MIDIbox SID V2 - User Manual". MIDIbox Projects. Archived from the original on 2019-07-04. Retrieved 2019-07-04.
"New revolutionary C64 music routine unveiled". 1xn.org. 2008-11-04. Archived from the original on 2012-02-04.
Mixer; SounDemoN; The Human Code Machine (2008-10-29). "Vicious Sid (2008)". Commodore 64 Scene Database. Archived from the original on 2019-07-04.
Graham (2014). "SID 6581/8580 (Sound Interface Device) reference". 8 bit IC register reference. Oxyron. Archived from the original on 2019-07-04.
Alstrup, Asger (2015-04-17). "Examination of SID noise waveform". SID - Sound & Music. Codebase64. Archived from the original on 2019-07-04.
"6581 Sound Interface Device (SID)" (PDF). Commodore Semiconductor Group. October 1982. Archived (PDF) from the original on 2019-07-05. Retrieved 2019-05-07.
Horton, Kevin. "Remarked SID Chips Sold as New". SID. Archived from the original on 2019-07-04.
"The SID 6581/8580 Recordings Archive". jme. Archived from the original on 2019-07-04.
"Stone Oakvalley's Authentic SID Collection (SOASC=)". Stone Oakvalley Studios. Archived from the original on 2019-07-04.
"SID File Format Description" (TXT). High Voltage SID Collection. Archived from the original on 2019-07-05. Retrieved 2019-07-05.
kenchis. "Java SID Player Music Library V2". SourceForge. Archived from the original on 2019-07-05. Retrieved 2019-07-05.
rolandh. "PSID64". SourceForge. Archived from the original on 2019-07-05. Retrieved 2019-07-05.
Bauer, Christian. "SIDPlayer". Archived from the original on 2019-07-05. Retrieved 2019-07-05.
Lankila, Antti. "JSIDPlay2: a cross-platform SID player and C64 emulator". Archived from the original on 2012-01-16.
Archived at Ghostarchive and the Wayback Machine: Replica Sound Cards - AdLib, Innovation SSI-2001, and SwinSID Ultimate., 9 July 2018, retrieved 2019-08-01

worldcat.org (Global: 5^th place; English: 5^th place)

search.worldcat.org

Perry, Tekla S.; Wallich, Paul (March 1985). "Design case history: the Commodore 64" (PDF). IEEE Spectrum. 22 (3). IEEE: 48–58. doi:10.1109/MSPEC.1985.6370590. ISSN 0018-9235. S2CID 11900865. Archived from the original (PDF) on 2019-07-04. Retrieved 2011-11-12.
"Making Tracks: The Noble Art of Game Music". NEXT Generation. Vol. 1, no. 3. GP Publications Inc. March 1995. p. 49. ISSN 1078-9693.
Latimer, Joey (August 1989). "Innovation Sound Standard". Compute!. Vol. 11, no. 111. p. 68. ISSN 0194-357X. Retrieved 2013-11-11.

youtube.com (Global: 9^th place; English: 13^th place)

"Unepic SID Channel". YouTube.
Archived at Ghostarchive and the Wayback Machine: Replica Sound Cards - AdLib, Innovation SSI-2001, and SwinSID Ultimate., 9 July 2018, retrieved 2019-08-01

MOS Technology 6581 (English Wikipedia)

6502.org (Global: low place; English: low place)

archive.6502.org

6581-8580.com (Global: low place; English: low place)

archive.org (Global: 6th place; English: 6th place)

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c64.org (Global: low place; English: low place)

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c64music.blogspot.com (Global: low place; English: low place)

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chipmusic.org (Global: low place; English: low place)

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cnn.com (Global: 28th place; English: 26th place)

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codebase64.org (Global: low place; English: low place)

csdb.dk (Global: low place; English: low place)

doi.org (Global: 2nd place; English: 2nd place)

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kevtris.org (Global: low place; English: low place)

mssiah.com (Global: low place; English: low place)

oth4.com (Global: low place; English: low place)

sid.oth4.com

oxyron.de (Global: low place; English: low place)

polynominal.com (Global: low place; English: low place)

semanticscholar.org (Global: 11th place; English: 8th place)

api.semanticscholar.org

sourceforge.net (Global: 1,669th place; English: 1,290th place)

sourceforge.net

psid64.sourceforge.net

ucapps.de (Global: low place; English: low place)

uwaterloo.ca (Global: 3,153rd place; English: 2,332nd place)

ist.uwaterloo.ca

web.archive.org (Global: 1st place; English: 1st place)

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youtube.com (Global: 9th place; English: 13th place)

archive.org (Global: 6^th place; English: 6^th place)

cnn.com (Global: 28^th place; English: 26^th place)

doi.org (Global: 2^nd place; English: 2^nd place)

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github.com (Global: 383^rd place; English: 320^th place)

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sourceforge.net (Global: 1,669^th place; English: 1,290^th place)

uwaterloo.ca (Global: 3,153^rd place; English: 2,332^nd place)

web.archive.org (Global: 1^st place; English: 1^st place)

worldcat.org (Global: 5^th place; English: 5^th place)

youtube.com (Global: 9^th place; English: 13^th place)