| Artist | | C Sides | | C-Sides | | C.A.P. | | Caamora | | Cab | | Cabaret Du Ciel | | Cabezas de Cera | | Caboto | | Cacciapaglia, Roberto | | Cactus Peyotes | | Cafe Jacques | | Cafeïne | | Cage | | Cai | | Cailyn | | CAIRO | | Cairo (UK) | | Cairo (US) | | Cakewalk | | Caldera | | Calibistrixe | | California Guitar Trio | | Caligonaut | | Calle Debauche | | Calliope (Italy) | | Calliope (USA) | | Callooh Callay | | Calomito | | Calvert, Robert | | Camaron Mantis | | Cambium | | Camel | | Camelias Garden | | Camembert | | Camori | | Campbell, Brent | | Campbell, Neil | | Campo Di Marte | | Can | | Canarios | | Cancer Conspiracy, The | | Cannata | | Canterbury Glass | | Canturbe | | Canvas | | Canvas Solaris | | Capability Brown | | Capasso, Carmine | | Capitolo 6 | | Caplan, Gadi | | Capricorn College | | Captain Beefheart & His Magic Band | | Captain Beyond | | Captain Kickarse and the Awesomes | | Capuano, Enzo | | Caravan | | Caravela Escarlate | | Carballido, José | | Cardoso, Manuel | | Carducci, Franck | | Carey | | Cargo | | Carlos, Walter | | Carlos, Wendy | | Carlotta Valdes | | Carlton Melton | | Carmen | | Carmine Ioanna Quartet | | Carol of Harvest | | Caron, Alain | | Carpani, Alex | | Carpathia Project | | Carpe Diem | | Carpe Nota | | Carpenter, Cody | | Carpenter, John | | Carpet | | Carpet Knights | | Carptree | | Cartel Carnage | | Carter, Colin | | Cartoon | | Cartoon Theory | | Case, Ian Ethan | | Casey, Rich | | Casino | | Casiopea | | Cask | | Caspian | | Cassle | | Cast | | Castanarc | | Castello Di Atlante, Il | | Castle Canyon | | Castle Mountain Moon | | Casual Silence | | Catapilla | | Caterpillarmen | | Cathedral | | Cats in Space | | Causa Sui | | Cauvin, Philippe | | Cavalli-Cocchi, Lanzetti, Roversi | | Cavallo | | Cawood, Charlie | | Ceccotti, Marc | | Celeste | | Celestial Burst | | Celestial Oeuvre | | Cell15 | | Cellar And The Point | | Cellar Noise | | Celluloid Winter | | CEN-Projekt | | Census Of Hallucinations | | Centofanti, Nicco | | Central Park | | Central Unit | | Centric Jones | | Cerchio d'Oro, Il | | Cerebus Effect | | Cerletti, Marco | | Cervello | | Chad Taylor Trio | | Chain | | Chalcedony | | Challenger, Ben | | Chambers Berlin Fiuczynski Lavitz | | Chambers, Dennis | | Chance | | Chandelier | | Chaneton | | Changing Images | | Chaos and The Cosmos | | Chaos Code | | Chaquico, Craig | | Chardeau, JJ | | Charlie | | Charron, Drew | | Charts and Maps | | Chase | | Chasing The Monsoon | | Chastain, David T. | | Chatham, Rhys | | Chaumont, Jean | | Cheer-Accident | | Cheeto's Magazine | | Cherry Five | | Cherubin | | Chest Rockwell | | Chicago | | Chicago / London Underground | | Chicago Underground Duo | | Chick Corea & Steve Gadd Band | | Chick Corea and Bela Fleck | | Chick Corea and John McLaughlin | | Children Of Nova | | Chimp Spanner | | Chimpan A | | Chinese Firedrill | | Choke The Word | | Chon | | Chris | | Chris Haskett and His Ongoing Dysphoria | | Christadoro | | Chroma Key | | Chromatic Aberration | | Chromb! | | Chrome Hoof | | Chui | | Churn Milk Joan | | Chuz Estrada | | Ciani, Suzanne | | Ciccada | | Cides, Guillermo | | Cilia, Aaron | | Cilia, Luis | | Cincinnato | | Cinema | | Cinema Show, The | | Cinemachanica | | Cinnamonia | | Circa | | Circa Survive | | Circe Link | | Circle | | Circles End | | Circuline | | Circulus | | Circus | | Circus Maximus | | Cirkel | | Cirkus | | Cirrus Bay | | Citadel | | Citizen Cain | | Citriniti | | Citron | | Citron, Neil | | Citta Frontale | | City of the King | | Clannad | | Clark, Louis | | Clark, Stewart | | Clarke, Di Meola & Ponty | | Clarke, Stanley | | Claudia Quintet, The | | Clay Foster & Carey Frank | | Clear Blue Sky | | Clearlight | | Clearlight (Cyrille Verdeaux) | | Clearlight - Cyrille Verdeaux | | Clearlight Mosaique | | Clepsydra | | Cleveland, Barry | | Cliffhanger | | Clivage | | Clive Nolan & Oliver Wakeman | | Clive Nolan and Oliver Wakeman | | Clockhammer | | Closure In Moscow | | Cloud Nine | | Cloud Over Jupiter | | Cloud People | | Cloudkicker | | Cloudmap | | Clouds | | Clouds Can | | Clouds Echo in Blue | | Club Merano | | Cluster | | Cluster and Eno | | Clynes, Susan | | CMX | | Coalition | | Coatsworth-Hay | | Cobham, Billy | | Cobham, Billy - George Duke Band | | Cochran, Todd | | Cochrane, Steve | | Code18 | | Códice | | Codo | | Coevality | | Cohan, Ryan | | Coheed And Cambria | | Colaiuta - Ford - Haslip | | Cold That Lasts All Winter, The | | Cold-Fusion | | Coley, Liam | | Colin Bass & Daniel Biro | | Colin Edward Robert Jurjendal | | Colin Tench Project | | Colina, Michael | | Collage | | Collapse | | Collapse Under The Empire | | Collecting Space | | Collections of Colonies of Bees | | Collegium Musicum | | Collins, Phil | | Colonel Chloroform | | Colonize | | Colosseum | | Colosseum II | | Colossus Project | | Colour Haze | | Colouratura | | Coma Rossi | | Combat Astronomy | | Combination Head | | Comedy Of Errors | | Commodus | | Companyia Elèctrica Dharma | | Compassionizer | | Comus | | Condition Red | | Confirmation Bias | | Confusion Field | | Congreso | | Conley, David | | Conqueror | | Conrad, Conny | | Consecution | | Consider The Source | | Conspiracy | | Contemporary Dead Finnish Music Ensemble | | Contes De Jerobie | | Contraction | | Contraluz | | Contramarea | | Contrappunto Project | | Contrarian | | Controtempo | | Conventum | | Cookin'X | | Cooperativa Del Latte | | Copeland, Stewart | | Copenhagen | | Coral Caves | | Coralspin | | Corciolli | | Corde Oblique | | Cordeiro, Júnior | | Cordero, Claudio | | Corea Holland Altschul | | Corea, Chick | | Corea, Chick Elektric Band | | Corea, Clarke & White | | Corea, Hancock, Jarrett & Tyner | | Corea/Hancock | | Corima | | Cormorano | | Corpo | | Corporesano | | Corrado Rustici | | Corte Dei Miracoli | | Cortex Complex | | Corvaglia, Alessandro | | Corvus Stone | | Coryell, Larry | | Cos | | Cos (Belgium) | | Cos (US) | | Cosa Brava | | CosaRara | | Cosentino, Saro | | Cosgrove, David | | Cosmic Danger | | Cosmic Dead, The | | Cosmic Garden, The | | Cosmic Knot | | Cosmic Remedy, The | | Cosmo The Band | | Cosmograf | | Cosmos | | Cosmos Factory | | Cosmosquad | | Cossu, Scott | | Cottarelli, Mario | | Cottingham, Rob | | Cotton Salamander | | Couch | | Coulson, Sam | | Counter-World Experience | | Counting Down Giants | | Court | | Covenant | | Covet | | Cowboys From Hell | | Cox, Ben | | Coyote Man | | Crack | | Crack The Sky | | Craft | | Crane & Fabian Project, The | | Cranium Pie | | Craven, Ben | | Crayon Phase | | Crayonphase | | Crea | | Credo | | Cressida | | Crime In Choir | | Crimson Jazz Trio | | Crimson ProjeKCt, The | | Crimson Sky | | Crippled Black Phoenix | | Crisalida | | Critical Quartet Experience | | Critters Buggin | | Crocodile | | Croft, Benjamin | | Cromwell | | Cronico | | Cronofonia | | Crooked Mouth | | Cross | | Cross, David | | Cross, David Band | | Crossroad Copeland | | Crosswind | | Crovella, Beppe | | Crown Lands | | Crucible | | Crucis | | Cruel Deity | | Crumbling Ghost | | Cruz de Hierro | | Cryptex | | Cryptic Vision | | Crystal Breed | | Crystal Palace | | CSI | | Cthulhu Rise | | Cucamonga | | Culpeper's Orchard | | Cuprum | | Cureton, Dave | | Curlew | | Currie, Billy | | Curtis, John | | Curved Air | | Cusco | | Cushma Cides Alexander | | Cusick, Paul | | Custodian, The | | Cuzzetto, Sandro | | Cyan | | Cyano | | Cye | | Cykada | | Cyklad | | Cyklus | | Cymbalic Encounters | | Cynic | | Cyrcus Flyght | | Cyril | | Czar | | Czukay, Holger | | Czyszy |
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| Album | Year |  | EP | 2013 |
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= Song added within the past days