For a hypothetical new thread, I wrote:

This is a thread dedicated to finding the original sources and where applicable, full versions of the loops in the Scratch music library. Huge thanks to everyone who helped out at the original thread but since the OP is inactive, most of the posts tend to be people restating knowledge we already know, so I thought it would be better to have a new thread with all the info in the topic post.

Loop Master List with Relevant Leads

Bossa Nova - Sample of “Bossa Bossa” by Kevin MacLeod
Cave - Sample of “Cave” by Beau Silver (SOURCE NOT FOUND)
Chill - Sample of “Air Hockey Saloon” by Chris Zabriskie
Classical Piano - Sample of “Variatio 1 a 1 Clav.” by J.S. Bach & performed by Kimiko Ishizaka
Cymbal Echo - Sample of “Hippie Top” by Brian Transeau / BT
Dance Around - ?
Dance Celebrate - ?
Dance Chill Out - ?
Dance Energetic - “Energetic Dance” by furbyguy
Dance Funky - ?
Dance Head Nod - ?
Dance Magic - ?
Dance Sitar - Sample of “Ganpati” by Masaladosa
Dance Slow Mo - ?
Dance Snare - ?
Dance Space - ?
Drip Drop - ?
Drive Around - Sample of “Drive the Bouncer” (original mix by PulpFusion) by Brian Transeau / BT
Drum - by Beau Silver according to metadata (SOURCE NOT FOUND)
Drum Funky - Sample of “FunkSoulSista” by Brian Transeau / BT
Drum Jam - Sample of “NSYNC Freaked” by Brian Transeau / BT
Drum Machine - by Beau Silver according to metadata (SOURCE NOT FOUND)
Drum Satellite - Sample of “Fast Satellite” by Brian Transeau / BT
Drum Set1 - by Mike Fleder according to metadata (SOURCE NOT FOUND)
Drum Set2 - ?
Dubstep - Sample of “Melodic Dubstep loop” by Orboscope
Eggs - “Music” by Marcell Balaton / bmarcell
Elec Piano - May be titled “rhodes C major loop 120” (SOURCE NOT FOUND)
Emotional Piano - Sample of “Inhale” by Peter Rudenko
Garden - “Town” by Beau Silver according to metadata (SOURCE NOT FOUND)
Guitar Chords1 - by Scott Berdahl according to metadata (SOURCE NOT FOUND)
Guitar Chords2 - by Scott Berdahl according to metadata (SOURCE NOT FOUND)
Hip Hop - “Hip Hop Beat 100 mp3( k)” by LoopMasters
Human Beatbox 1 - Sample of “Human-generated FX: Loops” by MMP Music Ltd.
Human Beatbox 2 - ?
Jungle - “Swirly jungle mp3(132 k)” by Samplenet
Kick Back - Sample of “Benda Bzounce” by Brian Transeau / BT
Medieval1 - “Death” by Beau Silver according to metadata (SOURCE NOT FOUND)
Medieval2 - “MyLove” by Beau Silver (very similar to “Underwater Trance” but exact match is NOT FOUND)
Movie 1 - Sample of “Send for the Horses” by Kevin MacLeod
Movie 2 - Sample of “Darkling” by Kevin MacLeod
Mystery - Sample of “Suspense Crime Scene" by tyops
Odesong - Sample of “CodeweekEU - Ode To Code” by Brendan Dominic Paolini
Reggae - Sample of “Regrezion” by Nueve Millas
Scratchy Beat - Sample of “Scratchim” by Brian Transeau / BT
Techno 1 - Sample of “gryrow” by gloob(ic) (the original unmixed version is not archived and NOT FOUND)
Techno 2 - Sample of “pralax” by gloob(ic) (the original unmixed version is not archived and NOT FOUND)
Trap Beat - Sample of “Trapped” by Kellee Maize
Triumph - “WinBattle” by Beau Silver according to metadata (SOURCE NOT FOUND)
Video Game 1 - Sample of “Pookatori and Friends” by Kevin MacLeod
Video Game 2 - Sample of “Nephlim” by Joe Mattson / Flick3r
Xylo 1 - (likely) ripped from a CD according to metadata
Xylo 2 - (likely) ripped from a CD according to metadata
Xylo 3 - ?
Xylo 4 - by Beau Silver according to metadata (SOURCE NOT FOUND)

FAQ

What is the origin of the “Cave (extended)” sound file?

iamout123 wrote:

Hey guys, I found an MP3 file that contains a (probably) full version of cave. I found this from a now unshared project about the scratch LGBTQ and BLM emojis. I found this project from an old Scratch forum with the same topic. Opened the link with turbo warp before the update that DOSENT allow viewing unshared projects.

Metadata indicates this is from an album called “Sounds of Scratch 1.4”. The original origin of this file beyond the project iamout123 found it in is unknown.

Why are there so many loops by Beau Silver, and do extended versions exist?
Beau Silver is the brother of the former Scratch Team member Jay Silver who seems to have been in charge of sourcing music loops for Scratch 1.4. It would seem plausible, then, that extended versions might not exist, however an extended version of Cave was found from an unknown original source.
Attempts have been made to contact Beau Silver with no response.

Did Androit write the Dance tracks?
There was a video on YouTube Music by an artist called Androit that consisted of all of the “Dance” tracks stitched together. There was some debate as to whether they were the original artist or were just falsely claiming the tracks for themselves, which often happens with stock music. The video has since been taken down with no copyright information provided.

What happened to the original Techno tracks?
gloob(ic) was a group of two MIT students, Jeff Lieberman and Eric Gunther. Scratch's Techno loops were both sampled from their album mass ave sessions. However, these are actually mixes of snippets taken from various live performances. The original audios used to be available at a MIT media domain but no longer exist.

What are the hex codes and do they mean anything?
Some nonsensical hex codes were found in the metadata of certain loops from Scratch 1.4, as well as in the mysterious “Cave (extended)” file. They likely have to do with iTunes's “Sound Check” feature. The most notable thing about them is that the first part of the hex code in “Cave (extended)” matches the hex code in “Cave”, which gives a pretty convincing argument for it being the official full version.

KitCatPow wrote:

I feel that it would be best for a new topic so that future confusion wont happen as often.
I'm glad you included an FaQ as well! Make sure to upload the link in this forum so people can go from here to there!

Master_Zeno wrote:

Help my “new studio ” button disappeared

Master_Zeno wrote:

(#364)
Help my “new studio ” button disappeared

Fun_Cupcake_i81 wrote:

If you guys want I could make a new topic for this with a up-to-date topic post with all the info / leads we have so far?
Since the OP for this topic is inactive I doubt they'd mind.

(Edit: I'm working on the topic post now but I won't post it without a consensus from you guys, since I can't exactly get permission from the OP who left Scratch.)

Edit 2: Okay, here's what I have typed up. Please let me know if I've made any mistakes or if there's anything that should be added!!

For a hypothetical new thread, I wrote:

This is a thread dedicated to finding the original sources and where applicable, full versions of the loops in the Scratch music library. Huge thanks to everyone who helped out at the original thread but since the OP is inactive, most of the posts tend to be people restating knowledge we already know, so I thought it would be better to have a new thread with all the info in the topic post.

Loop Master List with Relevant Leads

Bossa Nova - Sample of “Bossa Bossa” by Kevin MacLeod
Cave - Sample of “Cave” by Beau Silver (SOURCE NOT FOUND)
Chill - Sample of “Air Hockey Saloon” by Chris Zabriskie
Classical Piano - Sample of “Variatio 1 a 1 Clav.” by J.S. Bach & performed by Kimiko Ishizaka
Cymbal Echo - Sample of “Hippie Top” by Brian Transeau / BT
Dance Around - ?
Dance Celebrate - ?
Dance Chill Out - ?
Dance Energetic - “Energetic Dance” by furbyguy
Dance Funky - ?
Dance Head Nod - ?
Dance Magic - ?
Dance Sitar - Sample of “Ganpati” by Masaladosa
Dance Slow Mo - ?
Dance Snare - ?
Dance Space - ?
Drip Drop - ?
Drive Around - Sample of “Drive the Bouncer” (original mix by PulpFusion) by Brian Transeau / BT
Drum - by Beau Silver according to metadata (SOURCE NOT FOUND)
Drum Funky - Sample of “FunkSoulSista” by Brian Transeau / BT
Drum Jam - Sample of “NSYNC Freaked” by Brian Transeau / BT
Drum Machine - by Beau Silver according to metadata (SOURCE NOT FOUND)
Drum Satellite - Sample of “Fast Satellite” by Brian Transeau / BT
Drum Set1 - by Mike Fleder according to metadata (SOURCE NOT FOUND)
Drum Set2 - ?
Dubstep - Sample of “Melodic Dubstep loop” by Orboscope
Eggs - “Music” by Marcell Balaton / bmarcell
Elec Piano - May be titled “rhodes C major loop 120” (SOURCE NOT FOUND)
Emotional Piano - Sample of “Inhale” by Peter Rudenko
Garden - “Town” by Beau Silver according to metadata (SOURCE NOT FOUND)
Guitar Chords1 - by Scott Berdahl according to metadata (SOURCE NOT FOUND)
Guitar Chords2 - by Scott Berdahl according to metadata (SOURCE NOT FOUND)
Hip Hop - “Hip Hop Beat 100 mp3( k)” by LoopMasters
Human Beatbox 1 - Sample of “Human-generated FX: Loops” by MMP Music Ltd.
Human Beatbox 2 - ?
Jungle - “Swirly jungle mp3(132 k)” by Samplenet
Kick Back - Sample of “Benda Bzounce” by Brian Transeau / BT
Medieval1 - “Death” by Beau Silver according to metadata (SOURCE NOT FOUND)
Medieval2 - “MyLove” by Beau Silver (very similar to “Underwater Trance” but exact match is NOT FOUND)
Movie 1 - Sample of “Send for the Horses” by Kevin MacLeod
Movie 2 - Sample of “Darkling” by Kevin MacLeod
Mystery - Sample of “Suspense Crime Scene" by tyops
Odesong - Sample of “CodeweekEU - Ode To Code” by Brendan Dominic Paolini
Reggae - Sample of “Regrezion” by Nueve Millas
Scratchy Beat - Sample of “Scratchim” by Brian Transeau / BT
Techno 1 - Sample of “gryrow” by gloob(ic) (dead link; the original unmixed version is not archived and NOT FOUND)
Techno 2 - Sample of “pralax” by gloob(ic) (dead link; the original unmixed version is not archived and NOT FOUND)
Trap Beat - Sample of “Trapped” by Kellee Maize
Triumph - “WinBattle” by Beau Silver according to metadata (SOURCE NOT FOUND)
Video Game 1 - Sample of “Pookatori and Friends” by Kevin MacLeod
Video Game 2 - Sample of “Nephlim” by Joe Mattson / Flick3r
Xylo 1 - (likely) ripped from a CD according to metadata
Xylo 2 - (likely) ripped from a CD according to metadata
Xylo 3 - ?
Xylo 4 - by Beau Silver according to metadata (SOURCE NOT FOUND)

FAQ

What is the origin of the “Cave (extended)” sound file?

iamout123 wrote:

Hey guys, I found an MP3 file that contains a (probably) full version of cave. I found this from a now unshared project about the scratch LGBTQ and BLM emojis. I found this project from an old Scratch forum with the same topic. Opened the link with turbo warp before the update that DOSENT allow viewing unshared projects.

Metadata indicates this is from an album called “Sounds of Scratch 1.4”. The original origin of this file beyond the project iamout123 found it in is unknown.

Why are there so many loops by Beau Silver, and do extended versions exist?
Beau Silver is the brother of the former Scratch Team member Jay Silver who seems to have been in charge of sourcing music loops for Scratch 1.4. It would seem plausible, then, that extended versions might not exist, however an extended version of Cave was found from an unknown original source.
Attempts have been made to contact Beau Silver with no response.

Did Androit write the Dance tracks?
There was a video on YouTube Music by an artist called Androit that consisted of all of the “Dance” tracks stitched together. There was some debate as to whether they were the original artist or were just falsely claiming the tracks for themselves, which often happens with stock music. The video has since been taken down with no copyright information provided.

What happened to the original Techno tracks?
gloob(ic) was a group of two MIT students, Jeff Lieberman and Eric Gunther. Scratch's Techno loops were both sampled from their album mass ave sessions. However, these are actually mixes of snippets taken from various live performances. The original audios used to be available at a MIT media domain but no longer exist.

What are the hex codes and do they mean anything?
Some nonsensical hex codes were found in the metadata of certain loops from Scratch 1.4, as well as in the mysterious “Cave (extended)” file. They likely have to do with iTunes's “Sound Check” feature. The most notable thing about them is that the first part of the hex code in “Cave (extended)” matches the hex code in “Cave”, which gives a pretty convincing argument for it being the official full version.

pitobayola wrote:

-snippity do da-
Gloob(ic)'s songs have been reuploaded on soundcloud if you want to link these Gryrow and pralax