Question: SSavage Mode is a collaborative extended play by Atlanta-based rapper 21 Savage, and Atlanta-based record producer Metro Boomin, It was released on July 15, 2016, on which online audio distribution platform based in Berlin, Germany, that enables its users to upload, record, promote, and share their originally-created sounds?

Context paragraphs:
Perfect Timing (mixtape): Perfect Timing is a collaborative mixtape by Canadian hip hop recording artist Nav and Atlanta-based record producer Metro Boomin.  It was released on July 21, 2017 by Boominati, XO and Republic Records.  It contains production from Metro Boomin, Nav and Southside and features guest appearances from Lil Uzi Vert, Offset, Gucci Mane, 21 Savage, Playboi Carti and Belly.  Two singles were released to promote the mixtape: "Perfect Timing (Intro)" and "Call Me".

NoiseTrade: NoiseTrade is a global online audio and book direct-to-fan distribution platform based in Nashville, TN, that enables its users to upload, their originally-created music and books and give away for free without digital rights management to anyone who provides at least an e-mail address and zip code.  It was established by Derek Webb and artists he knew after he became one of the first major label artist to give his album away for free digitally on his website, where over 80,000 free copies of the album were downloaded.  He then used the mailing address gathered in to book shows and after attendance at his shows had increased dramatically he decided other artists could benefit from the same idea of giving away music in exchange for location and contact information that may be more valuable than money made selling digital albums.  Artists upload music with their free account, and then anyone can download ZIP files of mp3 and album art, only requiring an e-mail address and zip-code or country code for an opt-in newsletter from the artist, but optionally you may share using various social media or pay money to artists in the form of a tip-jar and the site takes a 20% cut for its costs and profit.  Since its creation it has been constantly added features, many of which are common on other music streaming and music download websites, and has recently added books and other written media.

X (21 Savage and Metro Boomin song): "X" (originally titled "X Bitch") is a song by American rapper 21 Savage and American record producer Metro Boomin.  It was released on July 14, 2016, as the lead single from their collaborative extended play, "Savage Mode" (2016).  The song features guest vocals from American rapper Future.  The song was certified 2x Platinum by the Recording Industry Association of America (RIAA).

Mixcrate: Mixcrate was an online audio distribution platform based in California, United States that enabled its users to upload, promote and share their DJ mixes to a worldwide audience and to help DJs promote and grow their careers as professional DJs.  It was a community-based platform designed for DJs mainly aimed at promoting their mixes and for fans to follow the work of their favorite DJs.  It also catered to music listeners, club promoters, radio stations and event organizers looking to discover new talent.

Free Guwop: Free Guwop is the first extended play by Atlanta-based rapper 21 Savage.  It was released on July 2, 2015.

Issa Album: Issa Album is the debut studio album by American rapper 21 Savage.  The album was released on July 7, 2017 by Slaughter Gang and Epic Records.  It features production from frequent collaborator Metro Boomin, alongside Southside, Pi'erre Bourne, Zaytoven, Wheezy, DJ Mustard and 21 Savage himself.  It succeeds 21 Savage's collaborative EP with Metro Boomin, "Savage Mode" (2016).

Savage Mode: Savage Mode is a collaborative extended play by Atlanta-based rapper 21 Savage and Atlanta-based record producer Metro Boomin.  It was released on July 15, 2016 via the iTunes Store, Apple Music, Spotify and SoundCloud.  The EP was self-released.

No Heart (song): "No Heart" is a song recorded by American rapper 21 Savage and American record producer Metro Boomin.  It was released on October 19, 2016, by Epic Records and serves as the second single from their collaborative extended play "Savage Mode".  The song was certified Platinum by the Recording Industry Association of America (RIAA).

SoundCloud: SoundCloud is an online audio distribution platform based in Berlin, Germany, that enables its users to upload, record, promote, and share their originally-created sounds.  Founders Alexander Ljung and Eric Wahlforss are the chairman and chief product officer (CPO), respectively.

Hearthis.at: Hearthis.at is a German online audio distribution platform based in Chemnitz, Germany, that enables its users to upload, record, promote, and share their originally-created sounds.

Supporting paragraphs: Savage Mode SoundCloud
Answer: SoundCloud