Search Results

   Best-Selling Tracks

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

Edit Type Society Sort Method



DESCEND - (by Blow Up Hollywood)  Year: 2010
Blow Up Hollywood Sliding and percussive Strings provide this song with both a sly and driving feel. Instrumental, Electronic, Ambient (pending)
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
6 Mixes Available
391952 0:16 Very Slow 58   


SIRENIZE (15 SEC EDIT C) - (by RLC Music)
RLC Music Edgy, gritty and contemporary instrumental with a purposeful drive. Hypnotic riffs ride a menacing groove. Perfect for dynamic marketing campaigns corporate branding, commercials and T. V underscores needing cutting edge music. Instrumental, Electronic, Electro-Industrial
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available  
505352 0:16 Medium 128   


DUB IT UP WILD 15 SEC - (by Gus Caveda)  Year: 2012
Gus Caveda An eclectic groove oriented instrumental track featuring crazy electronic dub-step sounds and beats. Hypnotic and alluring melodies. Very energetic and ambient. Great for fashion, clubs and other high intensity scenes. Instrumental, Electronic, Dubtronica
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available
556146 0:16 Medium 120   


DANCE IN THE JUNGLE 15 SEC - (by Eric Bolvin)  Year: 2015
Eric Bolvin Ambient and exciting, this piece takes you on a modern day tour of Africa. Percussive, heartening, and with a touch of exoticism, this is a warm, mid-tempo jazzy track, with flutes, synths and organic percussion. Perfect for productions that require a heart-warming, yet somehow exciting backdrop. Gr, Instrumental, Electronic, Oldschool Jungle
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
6 Mixes Available
707400 0:15 Medium 126   


PULSAR 15 SEC - (by Eric Bolvin)  Year: 2014
Eric Bolvin Hypnotic and pulsing, this EDM down tempo groove keeps the vibe going. Up-tempo electronic lounge music, with synth sounds and a great electronic beat, this track is the perfect backdrop for a modern, funky, and quirky production. Great for commercials, features, and TV shows, this track conveys a s, Instrumental, Electronic, Dark Ambient
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available
665195 0:15 Med Fast 120   


SATURATION 15 SEC - (by Eric Bolvin)  Year: 2014
Eric Bolvin Disturbing and dramatic piece uses all new sounds and textures. Moody, suspenseful, and moody track, with a sense of mystery. It brings to mind ghost stories and other horror related subjects. Perfect for creating a backdrop for suspense and horror movies and shows, and also for scenes in other prod, Instrumental, Electronic, Dark Ambient
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
672588 0:15 No Tempo   


VEHEMENT 15 SEC - (by Eric Bolvin)  Year: 2015
Eric Bolvin Moody, suspenseful, and moody track, with a sense of mystery. It brings to mind ghost stories and other horror related subjects. Perfect for creating a backdrop for suspense and horror movies and shows, and also for scenes in other productions that require a dark, mystifying feel. Instrumental, Electronic, Dark Ambient
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
733050 0:15 Medium 120   


VERACITY 15 SEC - (by Eric Bolvin)  Year: 2015
Eric Bolvin Moody, suspenseful, and moody track, with a sense of mystery. It brings to mind ghost stories and other horror related subjects. Perfect for creating a backdrop for suspense and horror movies and shows, and also for scenes in other productions that require a dark, mystifying feel. Instrumental, Electronic, Dark Ambient
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
6 Mixes Available
733055 0:15 Medium   


CATWALK NEWS (15-SECS VERSION) - (by Wez Devine)  Year: 2017
Wez Devine Funky, disco house elements dance over an old-school synth baseline to create a feeling of confidence and fun. Euro-pop feel in the style of Supermen Lovers, Room 5, DB Boulevard and Spiller. Great for use with fashion or any kind of technology scenes. Instrumental, Electronic, Electropop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
10 Mixes Available
833102 0:16 Medium 123   


TAKE ME BACK TO THE 80S 15 SEC MIX - (by Bobby Cole)  Year: 2015
Bobby Cole Head back to the 80s with bright lights, bold colours, groovy electro beats and huge hair! If you need that classic 1980s sound in your production then look no further! Take me back to the 80s is the grooviest piece of electro 80s funk that you will ever here! Instrumental, Electronic, Electro
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
Edit Type: 15sec - Electronic, Electro
718066 0:15 Med Fast   


THE SERPENT DANCE 15SEC - (by Tijuana Productions)  Year: 2009
Tijuana Productions Didgeridoo driven 15 sec intro, includes panning high hats. Great little segway into a dangerous alleyway or something similar, Instrumental, Electronic, Industrial (pending)
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
6 Mixes Available
356392 0:16 Medium 105   


SATURDAY MORNING DJ (LOOP B) - (by Paul Carlson)  Year: 2009
Paul Carlson Driving bass and drum lines with rhythmic synthesizer parts make this an upbeat and catchy track. Great for any fast moving production scene. Instrumental, Electronic, Ambient (pending)
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
3 Mixes Available
369086 0:14 Med Fast 140   


RUNNING (15S) - (by SaitoSphere)  Year: 2018
SaitoSphere Instrumental, Electronic, Ambient House
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available  
917839 0:15 Medium 128   


ANALOGUE TRANSMISSION 15S - (by A-P-M Productions)  Year: 2008
A-P-M Productions Floating, futuristic ambient electronica. Swirling synths pads and soft leads. Driving electric bassline and repeated piano notes. Big, bold drums kick in towards the middle of the full-length track. Instrumental, Electronic, Ambient (pending)
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
320405 0:16 Med Slow 94   


ITS HAPPENING (15-SECS VERSION) - (by Bjorn Lynne)  Year: 2015
Bjorn Lynne This track combines country elements with a modern dance beat and electronic pads. Electric guitar, Percussion and Dobro. A cool fusion of styles, this track will go well with exciting media, country / city themes. Very much "happening" (thus the title) and with an invigorating, positive energy. Instrumental, Electronic, Electro Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
10 Mixes Available
749505 0:16 Medium 120   


MAN OF INDUSTRY (15-SECS VERSION) - (by Bjorn Lynne)  Year: 2015
Bjorn Lynne A Dubstep based theme with Cinematic sensibilities using aggressive sounds such as Electronic Pads, Swells, Stutters, Risers, Distorted Drums, Electronic pads, Electric Guitar and Sound effects. Instrumental, Electronic, Electro Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
10 Mixes Available
749528 0:16 Med Fast 140   


INFORMATION STREAM (15-SECS VERSION) - (by Bjorn Lynne)  Year: 2022
Bjorn Lynne A mid-tempo electro pop groove, with a clean and spatial sound of synths, steady groove and piano melody. Technology / Innovation / Building / Industry. Instrumental, Electronic, Electropop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
10 Mixes Available
1119917 0:16 Med Slow 100   


FUZZY BEATS (15-SECS VERSION) - (by Pierre Langer)  Year: 2010
Pierre Langer Dark, shiny, hard edged, chrome styled techno-rock. Rough, tough, determined feel with raw, hard, Big Beat drums and aggressive synth patterns. Good for fast paced action, sports / extreme sports, motorsports, gritty footage and media, car chase scene, violence / fighting / brawling, etc. Determined, Instrumental, Electronic, Breakbeat
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
7 Mixes Available
490688 0:16 Medium 120   


DEE AND BEE (15-SECS VERSION) - (by Pierre Langer)  Year: 2007
Pierre Langer A fresh cut of Drum'n Bass. Nicely swirley and crunchy at the same time. Use with sports videos, information and data presentation, web sites and more. Atmospheric and groovy. Electronic, Breakbeat
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
267954 0:15 Med Slow 90   


EINE KLEINE NACHTMUSIK - BREAKBEAT REMIX, 15S - (by Alemor)  Year: 2009
Alemor One of the world's most famous classics mashed up with wild breakcore beats. With its' high level of energy and intensity, this will definately be noticed. I see a youth rebellion, a new and improved X, a hot makeover. The sublime synergy effect will make your media shine - with a humorous twist. Instrumental, Electronic, Breakbeat
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
13 Mixes Available
503876 0:18 Med Fast 140   


80S WHITE TRAFFIC - 15 SEC - (by Rudy Pusateri)  Year: 2009
Rudy Pusateri Infinitely glamorous. The eighties era spits out from your speakers. Frivolity and exhibitionism of those who are always at the top and the carelessness of someone who wants to try some dangerous business on the streets. Instrumental, Electronic, Pending
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
10 Mixes Available
399338 0:16 Med Slow 99   


ANIMA MUNDI - 15 SEC - (by Rudy Pusateri)  Year: 2009
Rudy Pusateri At the beginning the atmosphere is typical of some game shows like The Millionaire . Then it evolves towards industrial sounds with deep heavy distorted guitars. Very good for ethereal backgrounds and suspense, Instrumental, Electronic, Ambient (pending)
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
9 Mixes Available
400306 0:17 Med Slow 100   


COLD AS ICE 15 SEC. - (by Western Horizon Productions)  Year: 2015
Western Horizon Productions This dubstep track includes elements of several dance styles... Instrumental, Electronic, Dubtronica
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
707184 0:18 Slow   


THE BREAKDOWN 15 SEC. - (by Western Horizon Productions)  Year: 2014
Western Horizon Productions Synths layered over a dance groove which puts this track in the pocket... good backing especially for video games, TV, film, corporate or any place you need a beat and a strong bass line, Instrumental, Electronic, Breakbeat
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
7 Mixes Available
653899 0:16 Medium   


FUNKY STRUT 15 - (by A-P-M Productions)  Year: 2014
A-P-M Productions Deep and dirty bass riff with funky drums and hand claps. Mysterious chords on electric piano with high strings. Features wah-wah guitar in a 70s style. Instrumental, Electronic, Funktronica
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
9 Mixes Available
634332 0:15 Fast 85   


GUARANA 15 - (by A-P-M Productions)  Year: 2008
A-P-M Productions Exciting, uplifting Brazilian-influenced electronica. Driven by an acoustic guitar riff, with Latin percussion and swirling synth sounds. Uplifting and dynamic. Instrumental, Electronic, Psychedelic
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
320370 0:15 Medium 120   


THE UNSTOPPABLE FORCE 15SEC - (by Adagio Music)  Year: 2014
Adagio Music A smooth moving snake-like meandering trippy quirky cool fusion track featuring funk-a-tronic electro percussion deep rich bass space age synthesizer harmonies and a middle section with an acoustic piano solo. For your film, TV or radio show, video games, app, product, presentations, corporate, art, Female Vocals, Electronic, Electro Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
15sec - Electronic, Electro Hop - Electronic, Electro Hop
686968 0:18 Med Slow 96   


ALL NEW (15SEC) - (by Julio Kladniew)  Year: 2007
Julio Kladniew A positive, confident and uplifting track with analogue synths, arpeggiator, guitars and a solid bass line. A nice ambient track with a sound you want to listen in on. Instrumental, Electronic, Electro
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
10 Mixes Available
337780 0:16 Medium 120   


POSITIVE CHARGE - 15 SEC - (by Rick Dickert)  Year: 2015
Rick Dickert Acoustic and electric pianos, synths and electronic percussion play moody syncopated patterns suggested to underscore chic nightlife, sedate lounge sequences, trancelike formal processions and scenes depicting high tech automation. Key of D minor, 89 bpm, Instrumental, Electronic, Electro
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
15sec - Electronic, Electro - Electronic, Electro
733957 0:15 Med Slow 89   


SCRUNCH (15) - (by Steve Urwin)  Year: 2013
Steve Urwin Completely crazy electro funk. Fantastic hot groove that glues it together. Experimental without being out of control. Very cheerful and upward in mood. Mechanical with industrial sounds that make it fun to listen. Great for a fashion shoot, advertisement short. Not dark or depressive. Happy Robots, Instrumental, Electronic, Funktronica
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
8 Mixes Available  
576637 0:16 Med Slow 90   


MONSTER RAVE (15 SECOND EDIT) - (by Aaron Saloman)  Year: 2014
Aaron Saloman A 90s style underground electronica track. Starts with Hitchcock-inspired strings before transitioning into a pulsing dance beat with insistent bass, distorted synths and ethereal vibraphone. Ends with a cinematic bang. Perfect for edgy car commercials, action trailers, and underground goth clubs. Instrumental, Electronic, Electro-Industrial
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
6 Mixes Available
637391 0:15 Medium 120   


VAMPIRE (15 SECOND EDIT) - (by Aaron Saloman)  Year: 2007
Aaron Saloman Heavy, sinister electronic drum loop with distorted bass and other electronic sounds. Perfect for a dark, industrial, futuristic, or goth setting. Instrumental, Electronic, Electro-Industrial
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
3 Mixes Available
399795 0:15 Medium 112   


FACTORY LINE (15) - (by Steve Urwin)  Year: 2014
Steve Urwin Totally industrial gritty and full of awesome spectacular metallic cogs and wheels - uncompromising and gutsy, mostly invented sounds with slight tones. very adventurous but full on for promo and electro segue. Not dark but pushing non stop throughout the track. Awesome impact ending, Instrumental, Electronic, Electro-Industrial
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
6 Mixes Available  
671756 0:15 Medium 100   


URBAN TRAIN (15) - (by Steve Urwin)  Year: 2016
Steve Urwin Easy laid back electro with cool pop beat. Beat becomes more powerful the repeat theme throughout. combination of ambient and funk laced track. The loop would work very well in a moody black and white film clip. Has edge and presence with a curious melody, Instrumental, Electronic, Electro Ambient
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
7 Mixes Available  
777597 0:16 Med Slow 90   


STARLIGHT (15) - (by Steve Urwin)  Year: 2021
Steve Urwin Complex but wonderful arrangement of cool electric piano with massive fx and patches. It flows in a continuous style including some vocaloid and scifi additions. Cool background music for intro and soothing the world away. Calming with original sounds flooding the soundscape. Very hip combinations, Instrumental, Electronic, Electro Ambient
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
1092297 0:15 Med Slow 90   


IN THE CLOUD (15) - (by Steve Urwin)  Year: 2005
Steve Urwin Space beat with scifi weird sounds builds into a plodding strong beat with awesome but strange combination of sounds, great for sharp scene change. Streetwise beat with electro tendencies, disco on mars. Instrumental, Electronic, Dark Ambient
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
3 Mixes Available  
359679 0:16 Medium 120   


CAVE DWELLER (15) - (by Steve Urwin)  Year: 2013
Steve Urwin Dark but groovy, it has a chilling, laid back groove with much weirdness. Lots of techno babble fx wiih excellent pulse bets riding through the latter end of this beauty. Great for most dark scifi space crime street scene. Radio would really hum with the strangeness that drop in and out. Instrumental, Electronic, Electro-Industrial
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available  
581644 0:16 Med Slow 90   


SHAKE IT! (15 )LOOP - (by Steve Urwin)  Year: 2007
Steve Urwin very exciting drum bass track with sax and bass synth rocking with an electronic groove. builds well and has real dynamic. BIG drums add punch. The sax brings some rock & roll to the whole piece. a wild dance floor number. Club scene aka yellow. Raw feel. wild electronic with a funky backbeat, Instrumental, Electronic, Happy Hardcore
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available  
383281 0:15 Med Fast 130   


COMMON GROUND (15) - (by Steve Urwin)  Year: 2017
Steve Urwin Easy groove with exciting electro elements make this an interesting and vibrant choice for background music in a club, office commercial. Highly polished, gentle blend of chime synth dreamy sounds. Consistent tempo throughout. Space hip and very cool track. Subtle stop before last bar. Ace Bass! Instrumental, Electronic, Electro Hop
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
9 Mixes Available  
854961 0:15 Med Slow 80   


BEYOND WEIRD (15) - (by Steve Urwin)  Year: 2016
Steve Urwin strong backbeat throughout with massive fx sounds banging in and out of the mix. A rather electro kitchen sink collective. great for a feature spot or segue slot. mechanical tech and bizarre richness. Has a whimsical nature but keeps bringing fresh sounds throughout the whole shebang. funky weird, Instrumental, Electronic, Breakbeat
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available  
784686 0:15 Medium 100   


SLINK 15SEC - (by Aaron Saloman)  Year: 2016
Aaron Saloman A slowly building electro-pop dance instrumental. A bit tech-y, a bit mysterious, this track could work for anything from technology segments to reality show underscore to a Halloween dance. Quirky drum and bass loops joined by glittering synths and a slightly eerie melody. Fun and a little weird. Instrumental, Electronic, Electro
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
18 Mixes Available
810224 0:15 Medium 110   


HOT HEAD (15) - (by Steve Urwin)  Year: 2016
Steve Urwin Loaded with electro funk groove whizz bang! Total dance and funk laden delicious music. Heavy on the back beat with hot sax fiiling the gap. Made for the catwalk club scene episode. very useful for short fill in sounds. Wacky intro that never fails to get attention. Made for now, action on the floor, Instrumental, Electronic, Funktronica
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available  
784964 0:15 Medium 120   


DARK GO LIGHT COME (15) - (by Steve Urwin)  Year: 2023
Steve Urwin Funky techno track with life and imagination. Cool riffs that lift the mood with some cool guitar chords that bring a fresh flavour. Great music for activities at home, cluband work. Not thrashing or booming out but simple and effective that could be used in multiple genre, Instrumental, Electronic, Funktronica
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
5 Mixes Available
1191351 0:16 Med Slow 90   


FACTORY OF IRON (15) - (by Steve Urwin)  Year: 2010
Steve Urwin An electro classical piece with soft synth sounds + drum machines. Half tempo feel that gives a slightly dark overtone, big feet and big strides. A little odd and a little strange but melodic. Great synth fx pads, subtle and not raw. Spacious and flowing. Robotic in feel, excellent for theatre. Instrumental, Electronic, Electro
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
3 Mixes Available  
377070 0:18 Medium 110   


FISH AND GLITCH (15) - (by Steve Urwin)  Year: 2010
Steve Urwin Totally crazy sounds bleeding into a dance groove that fills the space. Brilliant movie theme for intro or credits. Stars Wars meets the dance floor bunnies. Loads of interest with space to get hold of the drum driven mood. Exciting and innovative to expect the unexpected. Rocking but has subtlety, Instrumental, Electronic, Electro
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
6 Mixes Available  
452265 0:15 Med Fast 130   


CRYPTIQUE - 15 SEC - (by Rick Dickert)  Year: 2012
Rick Dickert Syncopated bass trance groove with analogue and digital synthesizer pads, percussion and woodwinds. Suggested for mysterious scenes, illusions, hallucinations, public service announcements and underscoring of narration, voice-overs, TV and radio production music spots. Key of E minor, 110 beats/min, Instrumental, Electronic, Psychedelic
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available
564290 0:15 Medium 110   


PREPARATION - 15 SEC - (by Rick Dickert)  Year: 2017
Rick Dickert Digital and analog synths combine with beatbox percussion in a minimal, syncopated, trance-influenced arrangement suggested to underscore images of precision, robotic motion and automation. Key of G minor, 72 bpm, Instrumental, Electronic, Psybient
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
15sec - Electronic, Psybient - Electronic, Psybient
854189 0:15 Slow 72   


AMBER - 15 SEC - (by Rick Dickert)  Year: 2010
Rick Dickert 15 second mix of a slow pulsating electronic groove, as Moog and Prophet synths trade hypnotic brassy, plucked motifs over echoing synthesized organ rhythm. Suggested for urban, psychedelic, extreme lifestyle scenes, sequences with psychological conflict or danger. Key of E minor, 104 beats/min, Instrumental, Electronic, Dark Ambient
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available
416789 0:15 Med Slow 104   


BLACK SWAN (15 SEC) - (by Nick Nicolas)  Year: 2016
Nick Nicolas Delicate light sensitive gentle beautiful emotional ethereal music. 15 seconds. Instrumental, Electronic, Electro Ambient
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available
797534 0:15 Medium 120   


EVER CHANGING WORLD (15 SEC) - (by Nick Nicolas)  Year: 2017
Nick Nicolas Techno-electro instrumental that is a well paced intense futuristic industrial groove. Has a mood of everything is moving at a breathtaking speed. Works well as a contemporary city soundscape. Great backdrop to metropolitan collage promotions. Also great for the modern digital world of technology. Instrumental, Electronic, Electro-Industrial
Type Play Track Info Catalog ID Min:Sec Tempo & BPM Price Control
4 Mixes Available
879675 0:15 Medium 128   


Back to Top
sound effects for theatre,
wav files samples,
sounds effects for imovie,
free sounds effects,
heart beat sound,
owl sounds for download,
download heartbeat sound,
free horse race sound wav,
wmv sound clip train,
rocket launch sound effect,
downloadable draughtsboard shark noises,
sound effects fasten your seatbelt,
hiphop chants and sound effects,
sound effects party background noise,
paparazzi sound effect,
free roman coliseum sound effects,
email sound fx,
movie sound effects,
downloadable sound fx,
downloadable powerpoint sounds