Search Results

   Best-Selling Tracks

IMPORTANT: To refine track results, adjust the filter and/or sort options below.

Edit Type Society Sort Method



KRUNKER - (by David Banks)  Year: 2014
David Banks Gritty Hip Hop instrumental with a full on street attitude and tons of swagger. Youthful get out of my face cool vibe. Great for youth teen shows or that 30 second energy drink commercial. Instrumental, Hip Hop, Crunk
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
2 Mixes Available
700595 0:34 Med Slow 98   


UPLIFTING DITTY (30) - (by David Banks)  Year: 2014
David Banks Fun light bouncy uplifting orchestral hip hop. This 30sec version has no choir. Has a nice uplifting build towards the end, Instrumental, Hip Hop, Electro-Orchestral
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
2 Mixes Available
696936 0:32 Med Slow 95   


LOVERS LANE - (by Keston Prescott)  Year: 2012
Keston Prescott Background Music for film, tv, drama,, Instrumental, Hip Hop, Dramatic Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
Edit Type: 30sec - Hip Hop, Dramatic Hip Hop
628610 0:31 Med Fast 111   


YOKEL'S HAT (30 SEC) - (by Chuck Mott)  Year: 2015
Chuck Mott Fun and quirky with a comedic edge hick hop track. Acoustic guitars, dobro and bass meet expertly crafted Hip Hop drum beats to create a track that is sure to make an impression. Perfect for dramedy or country type scenes, will work just as well for web video, corporate tracks or advertising. Instrumental, Hip Hop, Country-Rap
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
7 Mixes Available
728702 0:31 Medium 110   


FRESCA - (by Sean Byrd)  Year: 2013
Sean Byrd Nice and mellow vinyl-esque beats compliment jazzy piano. This track gives an open invitation to come on in and hear more. Instrumental, Hip Hop, Trip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
Edit Type: 30sec - Hip Hop, Trip Hop
598349 0:31 Med Slow 90   


CONTINUENDO (30 - SECS VERSION) - (by The Hands of Stone)  Year: 2013
The Hands of Stone Downtempo chill-funk, Blending the sounds of the 1970's, 80's, 90's and 00's with today's lounge chill sound, this track is easy-going, confident and strutting - in a laidback and funky way, Live performed instruments, Instrumental, Hip Hop, Trip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
10 Mixes Available
592986 0:31 Med Slow 82   


LARRY LIZARD (30 SECOND EDIT) - (by Owen Phillips)  Year: 2013
Owen Phillips A laid back and upbeat track featuring a hip hop drumbeat and mellow keys, with a confident and chilled out feel. Good for a variety of productions, including TV scores, documentaries and commercials. Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
9 Mixes Available
614921 0:30 Med Slow 100   


THIS IS ME (HIP HOP INSTRUMENTAL) - (by Ramon O. Lewis)  Year: 2009
Ramon O. Lewis A urban West Coast style hip hop rendition. Similar to a Dr. Dre or Eminem production. Featuring deep brass, deep bass, and synths. Possible uses can range from street scenes, urban scenes, songs,, Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
Edit Type: 30sec - Hip Hop, Hip Hop Instrumental
679670 0:23 Med Slow 85   


BE READY - (by Crystal Drive)  Year: 2014
Crystal Drive A dramatic, instrumental, club track featuring synth and driving bass. Great for TV & film underscore introducing a "street smart", confident character/person or scenes with a confident and aggressive vibe. Ideal for short trailers, street, driving and club scenes, web videos and semi-dark triumph. Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
Edit Type: 30sec - Hip Hop, Hip Hop Instrumental
636412 0:38 Med Slow 90   


OUTLAWS (30 SEC) - (by Konstantinos Panagiotidis)  Year: 2014
Konstantinos Panagiotidis Hip Hop instrumental track with orchestral elements like timpani, percussions and strings. The orchestral elements add an epic touch while the electric guitar adds a gritty vibe to the track. Opens with the strings and builds into an epic, big sound. It could work on sports promos or reality tv. Instrumental, Hip Hop, Dramatic Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available
671525 0:31 Med Slow 80   


ARABIAN MOON (30 SEC) - (by Konstantinos Panagiotidis)  Year: 2015
Konstantinos Panagiotidis Hip hop instrumental track, featuring synths, percussions and exotic instruments like sitar and sarod. Upbeat and very rhythmic, with middle East flavors and ethnic mood overall. Suitable for reality tv, fashion shows and commercials. Instrumental, Hip Hop, Dramatic Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
705448 0:31 Med Slow 100   


MR CHAVES - (by Dimitar Vasilev)  Year: 2014
Dimitar Vasilev A story of a young musician working hard on his music. A cty boy adventures. Instrumental, Hip Hop, Hip Hop Experimental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
Edit Type: 30sec (Urban,Drama,biography,Film) - Hip Hop, Hip Hop Experimental
656085 0:32 Med Slow 103   


PAID IN FULL 30 SEC - (by Frequencee)  Year: 2014
Frequencee This mid tempo trap inspired track has an aggressive in your face feel. A mix of violin, brass stabs, arpeggiator, percussion all on top of a snap beat, dancing hi hats and an 808. The track would be a perfect fit for urban themed commercial, movie, sports programming and reality tv, Instrumental, Hip Hop, Dirty South
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available
695679 0:30 Med Fast 140   


ETHICAL HYMENS 30 SEC - (by Dorta)  Year: 2015
Dorta An Exciting track with an urban hiphop flavor. Starts out with the phrase 'Ethical children for ethical gods' and builds into an intense crescendo of, synths & cinematic strings! The music is dark brooding & dynamic. Works with chase scenes, teenage, gangster, horror, video game themes & more. Spoken Word, Hip Hop, Alternative Rap
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
3 Mixes Available
718824 0:32 Med Slow 90   


RIDER BEAT (30S) - (by Matthew Mirron)  Year: 2015
Matthew Mirron Stripped-back, bass-driven hip-hop track with tight drums and smooth synths. City streets, lowriders, gangstas and guns, urban cool. Great for ads and television, anything wanting a bassy beat. Instrumental, Hip Hop, Booty Bass
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available  
726931 0:30 Med Fast 129   


BIG E - (by Evens Colas)  Year: 2012
Evens Colas The perfect track for a street scene where you are capturing the feel of attitude and swag. This one reeks of charisma, power, magnetism, and sexiness. It gives you a feeling that something is going down. Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
556866 0:32 Med Slow 100   


EVERYBODY GET DOWN 30 SEC - (by Dean Wagg)  Year: 2014
Dean Wagg Super funky old school influenced hip-hop soul which sounds like NWA & Will Smith meeting James Brown. Cool, Funky & Retro. With Raps, scratches, sampled beats & all the hallmarks of nineties hip-hop & R&B. Instrumental, Hip Hop, Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
3 Mixes Available
667918 0:31 Med Slow 100   


BACK STREET (30-SECS VERSION) - (by Damian Martin Turnbull)  Year: 2012
Damian Martin Turnbull Laidback, streetwize, mid-tempo hip-hop groove with sub-bass, string pads and scratches. Instrumental, Hip Hop, Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
7 Mixes Available
531275 0:37 Med Slow 102   


INSTRUMENTAL HIP HOP #1 - MYSTERIOUS (30) - (by Chameleon Music)  Year: 2010
Chameleon Music Instrumental Hip Hop music with a mysterious, smooth touch. Works great in Urban, Documentary, City, Skate & Bike movies, Sports, Commercials, Youth, After School. Serves well in the Background as well. Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
3 Mixes Available
716078 0:30 Med Slow 90   


INSTRUMENTAL HIP HOP #3 - FAST & FURIOUS (30 SEC) - (by Chameleon Music)  Year: 2010
Chameleon Music An Instrumental Hip Hop Beat with fast pace, kind of dirty. Works great in Urban, Documentary, City, Skate & Bike movies, Sports, Commercials, Youth, After School. Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
3 Mixes Available
716080 0:30 Med Fast 135   


STREET CORNER POETS (30 SEC) - (by Fab Claxton)  Year: 2016
Fab Claxton Playful, fun, and wholesome - a hip hop song with a childlike pop sensibility. A pounding boom bap beat, deep throbbing bassline, organ, staccato dulcimer, dreamy synths, and a very catchy piano riff. Perfect for comedy, commercials, children's productions, or anything that needs a lighthearted tone, Instrumental, Hip Hop, Pop Rap
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
19 Mixes Available
811174 0:37 Med Slow 85   


HOT TRASH (30 SEC) - (by Fab Claxton)  Year: 2015
Fab Claxton This song combines the funky, pounding beats of Dr. Dre with 70s era classic rock guitar riffs. It's a groovy, tense song that's perfect for drama, sports, and darker material. Instrumental, Hip Hop, Action Thriller Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
15 Mixes Available
761488 0:31 Med Slow 90   


HOUNDS OF HELL (30 SEC) - (by Fab Claxton)  Year: 2016
Fab Claxton This song is the perfect blend between retro 80s synthwave, hip hop, and indie rock. It combines the funky beats of Dr. Dre with shimmering 80s synths and the melodic indie dance style of Gorillaz. Perfect for commercials, drama, sports, and fashion uses. Instrumental, Hip Hop, Alternative Rap
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
19 Mixes Available
810551 0:35 Med Slow 90   


PLAYTIME IS OVER (30 SEC) - (by Fab Claxton)  Year: 2016
Fab Claxton This atmospheric, cinematic track combines the modern hip hop sound of Drake with the smooth RnB sounds of The Weeknd. Perfect for commercial, retail, fashion, or dramatic uses. Instrumental, Hip Hop, Dramatic Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
14 Mixes Available
810894 0:31 Slow 70   


DOWNTOWN RANK 30 SECOND VERSION - (by Espionage)  Year: 2013
Espionage A mid tempo hip hop/trip hop groove. A spacial keyboard melody creates an open vibe. an orchestral melody comes in to make the vibe more dramatic and gritty. Cellos and strings are used for the orchestra. Male voices saying "Yeah, yeah, yeah" make this tune sound more urban and gangster. Male Vocals, Hip Hop, Electro-Orchestral
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
3 Mixes Available
615232 0:37 Med Slow 90   


LORD SWEET PAPPY JOHNSON (30 SECOND VERSION) - (by Fab Claxton)  Year: 2014
Fab Claxton The worlds of country rock and hip hop collide in this greasy, funky hick hop track. It takes some twangy Buck Owens guitars and combines them with a thumpin' old school beat. It's chicken pickin' finger lickin' good. It features a catchy banjo riff for extra down-home charm. Yeehaw, homeboy. Instrumental, Hip Hop, Country-Rap
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
15 Mixes Available
660265 0:30 Slow 78   


HARDCORE SQUATCHIN' 30 SEC - (by Fab Claxton)  Year: 2014
Fab Claxton Giddy-up, little homie. This happy-go-lucky hick hop track takes bits of rap, rockabilly, and indie rock, then adds a little Louisiana Cajun spice. It's as funny as it is funky. Banjo, fiddle, accordion, Jew's harp, greasy guitars, an 80s synth bass - and loud, aggressive drums. Perfect for comedy. Instrumental, Hip Hop, Country-Rap
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
15 Mixes Available
668532 0:36 Medium 95   


CRYSTAL STREET POSSE 30 SECOND - (by Geoffrey Wilson)  Year: 2016
Geoffrey Wilson An instrumental rap rock track in the style of The Crystal Method and Linkin Park that is groovy and rebellious. Would work well in urban, crime, gangster, thriller, action, chase, pursuit, military, spy, sports competition and adventure scenes. Instrumental, Hip Hop, Rap Rock
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
8 Mixes Available
796711 0:31 Med Slow 80   


ITS THE NEXT HOUSE 30 - (by Mikola McCole)  Year: 2011
Mikola McCole Electric jamming and grooving song with female ultra busy rap and choir scat singing. Very up-to-date sounds. Vinyl scratching and some "computer sounds" too. Harmless happy song. Also some exotic drums mixed in daringly. Female Rap & Vocals, Hip Hop, Hip Hop Experimental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available
493269 0:30 Medium 120   


CAREFUL NOW - (by Patrick Best)  Year: 2013
Patrick Best From mystery suspense to love relationships, this mellow dramatic hip hop style groove has the vibe suitable for both uses. Smooth violin lines and cello stabs add a subtle side for scenes of reflection over an urban beat. Perfect for reality TV, commercial, corporate, documentary and travelog use. Instrumental, Hip Hop, Dramatic Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
8 Mixes Available
592665 0:30 Med Slow 91   


GROOVE DOGG (30) - (by Alan Fagan)  Year: 2017
Alan Fagan Here is a fun, old school hip hop instrumental with a great musical groove and real horn section. Think 1980s and 1990s hip hop music videos. Parachute pants and gold chains. Instrumental, Hip Hop, Old School
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
9 Mixes Available
844510 0:30 Med Slow 96   


CELLO AND THE MACHINE - 30 SEC - (by Aleksander Arsov)  Year: 2011
Aleksander Arsov Sad, divine eternal meditative song - A meditative peace with beautiful cello and violin lead line along with eastern percussion. Romantic, eternal and peaceful with touch of mystery. A mixdown of western and eastern music crossed with modern beat along with traditional percussion. Instrumental, Hip Hop, Dramatic Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
3 Mixes Available
471454 0:31 Medium 107   


JAZZY BREAK (30SEC VERSION 2) - (by Nathaniel Jones)  Year: 2011
Nathaniel Jones Somewhere between hip-hop, funk and jazz, this smokey track is based solely in sampled drums and acoustic upright bass. With some influences from breakbeat, the track brings the urban, street style to the jazz club. Suited for crime, suspense, gangsters, investigation. Movies, tv and other media. Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
11 Mixes Available
467728 0:32 Med Slow 90   


MIAMI NIGHTS (30SEC) - (by Nicholas Pesci)  Year: 2010
Nicholas Pesci Hot & current sounding Hip Hop track with cool beat and driving piano lead. Perfectly suits to underscore youth culture, hip and trendy people. Very urban sounding. Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available
437983 0:30 Slow 73   


SOWOT (30SEC) - (by Nigel Male)  Year: 2011
Nigel Male Upbeat urban calyso, with caribbean breaks and pumping beats. Perfect for exotic cooking show, travel, fashion, documentary, TV theme or commercial. Anything caribbean. Scruffy TV, Caribbean connection, Male Rap, Hip Hop, Caribbe Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
2 Mixes Available
505190 0:30 Medium 127   


PENÉLOPE - (by Watt Generated Benjamins)  Year: 2011
Watt Generated Benjamins This Latin rock guitar song was composed by DJ cut throat and includes three live instruments played out onto pro tools. Great for parties, frat parties, video games and social gatherings, Instrumental, Hip Hop, Midwest Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
3 Mixes Available  
508156 0:32 Med Slow 96   


QUIRKY HIP HOP - (by Joseph Rusnak)  Year: 2010
Joseph Rusnak A playful, upbeat hip hop instrumental with animated, boisterous strings. This track is great commercials selling food products, toys, cleaning products. Also for any scenes that are fun, comical, mischievous, joking or children's cartoons. Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available
420347 0:31 Med Slow 103   


CLUBNIGHT30SEC - (by Joseph Rusnak)  Year: 2010
Joseph Rusnak An explosive, hard-hitting club banger featuring wild drum grooves and heavy bass. Great for advertisements geared towards youthful, urban audiences. Also technology, food, alcohol, travel, fashion, clothing and men's health. Perfect for film and television dance or party scenes. Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
2 Mixes Available
420650 0:32 Slow 73   


FIRE30SEC - (by Joseph Rusnak)  Year: 2010
Joseph Rusnak A smooth, hard-hitting club banger with tinges electro and southern hip hop. Works great for anything directed towards youthful, trendy audiences. Also suitable for technology, food, alcohol, travel, fashion, clothing and men's health. Great for film and television club, dance or party scenes. Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
2 Mixes Available
438936 0:31 Slow 68   


WHAT - (by Tom Dwyer)  Year: 2011
Tom Dwyer 'What' is a hiphop:30 second instumental. A modern electric feel with drums gives this piece a futuristic sound. Great for commericals, TV and off beat music needs. Instrumental, Hip Hop, Hip Hop Experimental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
Edit Type: 30sec - Hip Hop, Hip Hop Experimental
489482 0:33 Med Slow 98   


COLLAPSED RED BEANS (30SEC) - (by Watt Generated Benjamins)  Year: 2011
Watt Generated Benjamins Danger is lurking nearby as the mist shrouds the inner city lights. It becomes pitch black when your heart begins pulsating, the sound of footsteps get louder on the urban streets. Urban Incident is a suspenseful powerful track for any action thriller, edgy commercial and video games. Instrumental, Hip Hop, Dramatic Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
3 Mixes Available  
492505 0:34 Med Slow 100   


URBAN RELIC (30-SECS VERSION) - (by Ferenc Hegedus)  Year: 2010
Ferenc Hegedus Urban, inner city, hip-hop with a wistful undertone. Perhaps dark days, sorrow or misery. A dark, urban edge, like a rainy day in the city. A slight feeling of something old, mixed with the new. Urban drama scene. Instrumental, Hip Hop, Hip Hop Soul
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
10 Mixes Available
455877 0:29 Med Slow 86   


AIRPORTSHUFFLE UNDERSCORE (UNDERSCORE 30SECS) - (by Music Candy)  Year: 2018
Music Candy The surreal atmosphere of an airport captured in musical form. GOT THAT VIBE, by Andrew White. Instrumental, Hip Hop, Electro Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
6 Mixes Available  
935050 0:31 Med Slow 100   


BOUNCY KIDZ (HEY-OH) - (by Johnny Karlsson)  Year: 2009
Johnny Karlsson kids, children's hip-hop, fun with choir going "hey, oh" Mixed Vocals, Hip Hop, Pop Rap
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
Edit Type: 30sec - Hip Hop, Pop Rap
373565 0:33 Med Fast 140   


COMPETITOR 11 - (by Julian Scott)  Year: 2010
Julian Scott Moody fx opening into solid beat with gospel chant and sequenced piano, celebratory, thematic to Olympic Opening, Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
2 Mixes Available
383105 0:31 Med Fast 141   


FIGHT NIGHT - (by Jimmy Aurora)  Year: 2010
Jimmy Aurora Medium tempo, electronic, urban track with a catchy syncopated groove loop, Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
397374 0:30 Med Slow 101   


LOUNGIN' OUT - (by Jimmy Aurora)  Year: 2010
Jimmy Aurora Slow tempo, electronic, urban track with a lounge beat, keys, and a synth that's chill and laid-back Sounds like N/A. Instrumental, Hip Hop, Hip Hop Instrumental
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
398965 0:31 Medium 108   


LET'S BOUNCE - (by Jimmy Aurora)  Year: 2010
Jimmy Aurora Medium-slow tempo, electronic, urban track featuring a pop drum loop with a bouncy feel and a light synth melody, Instrumental, Hip Hop, Action Thriller Hip Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
397384 0:30 Med Slow 100   


BUBBAS AND PLAYAS 30 SEC. - (by Western Horizon Productions)  Year: 2015
Western Horizon Productions This upbeat Hick-Hop track features fiddle accompanied by acoustic guitar and bass over sampled hip-hop beats... Instrumental, Hip Hop, Country-Rap
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
6 Mixes Available
728350 0:32 Med Fast 140   


UP YOURS JOEL - 30 - (by Steve Gracy)  Year: 2009
Steve Gracy Instrumental, Hip Hop, Hip Hop Rock
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
2 Mixes Available
373026 0:30 Med Slow 80   


Back to Top
sondrio,
202 digital sound effects,
television sound effects,
nerd laugh downloads,
mechanical sound effects free download,
alvin and the chipmunks sound clips,
buy sound effects for making videos,
smoke and cough wav sounds,
free panto sound effects,
free gunshot sound effects,
free wav sound bites,
hip hop air horn sound effect,
downloadable whale sounds,
scratch sound effect,
bugs bunny sounds,
paparazzi sound effect,
downloadable keyboard sounds,
wav sounds effects,
system sounds wav,
sci fi sound effects