- [Switch~ Ensemble]
- S[ILK]S
- Saariaho, Kaija
- Sabet, Parisa
- Sacks, Rick
- Safir, Rachid
- Sahl, Michael
- Sailor, Janna
- Sainct Laurens
- Saint-Amand, Pierre
- Saint-Denis, Anne
- Saint-Denis, Patrick
- Saint-Gelais, Hughes
- Saint-Gelais, Joseph
- Saint-Germain, Claude
- Saint-Jacques, Anne-Marie
- Saint-Pierre, Christian
- Saint-Saëns, Camille
- Sallafranque, Yan
- Salonen, Esa-Pekka
- Salus, Hugo
- Salvador, Matilde
- Salzedo, Carlos
- Samandari, Farshid
- Samson-Dunlop, François
- Sánchez-Gutiérrez, Carlos
- Sandred, Örjan
- Sarasate, Pablo de
- Sarreau, Barbara
- Sarvig, Ole
- Sas, Ewa
- Satie, Érik
- Saulnier, Laurent
- Saunders, Nancy
- Saunders, Shari
- Sauvage, Danielle
- Sauvé, Martial
- Savage, Danielle
- Savoie, Geneviève
- Savoie, Guylaine
- Savouret, Alain
- Sæther, Harald
- Scales, Barbara
- Scali, Gaëlle
- Scalia, Robert
- Scapegoat
- Scarpellini, Lina
- Scelsi, Giacinto
- Schaeffer, Pierre
- Schafer, R Murray
- Schepper
- Scherchen, Tona
- Schick, Ignaz
- Schikaneder, Emanuel
- Schimana, Elisabeth
- Schlijper, Sven
- Schlosberg, Daniel
- Schmithüsen, Ingrid
- Schmitt, Markus
- Schnarr, Jasmine
- Schneider, Jean-Fabien
- Schneller, Oliver
- Schnittke, Alfred
- Schoen, Matthew
- Schönberg, Arnold
- Schotzko, David
- Schreier, Anno
- Schrey, Michiel
- Schrott, Raoul
- Schryer, Claude
- Schuback, Peter
- Schubert, Franz
- Schubert, Peter
- Schubring, Julius
- Schulich Ensemble
- Schulich Saxophone Ensemble
- Schulich School Singers
- Schulich String Quartet
- Schuller, Gunther
- Schulrabe, Bertil
- Schulte, Tom
- Schumacher, Marlon
- Schumann, Clara
- Schumann, Robert
- Schweizer, Manuel
- Schwitters, Kurt
- Sciarrino, Salvatore
- Scott, Ryan
- Scriabine, Alexandre
- Sebastián, Maitane
- Segalowitz, Nina
- Séguin, Caroline
- Sekowski, Tom
- Selleck, Johanna
- Selmi, Jean-Christophe
- SEMensemble
- Semionova, Olga
- Senécal, Pierre-Luc
- Serralheiro, Paul
- Serraz, David
- Séry, Christelle
- Seta, Michal
- Seter, Mordechai
- Settel, Zack
- Seugueuveugueu Quartet
- Sévigny, Annik
- Sexton, Erin
- Shakespeare, William
- Shalabi, Sam
- Shalabi Effect
- Shanghai Symphony Orchestra
- Sharifi, Jamshied
- Sharkya’, Vergil
- Sharman, Rodney
- Sharp, Chris
- Shbeir, Ghada
- Sheets, Zach
- Shelley, Alexander
- Sheppard, Meg
- SHHH!! Ensemble
- Shi, Fuhong
- Shimana, Elisabeth
- Shinohara, Makoto
- Shooner, Anik
- Siamois Synthesis
- Sibelius, Jean
- Siddall, Jon
- Sieffert, Juliette
- Sieffert, Marc
- Sigal, Rodrigo
- Sigesmund, Darren
- Sighicelli, Samuel
- Sikora, Elżbieta
- Silvestrov, Valentin
- Simard, Dominique
- Simard, Guillaume
- Simard, Marie Josée
- Simard, Matthieu
- Simard, Pierre
- Simard-Galdès, Magali
- Simas, Richard
- Simonis, Jean-Marie
- Simons, Mark
- Šimurdová, Zuzana
- Sinha, Roger
- Sinti, I Wayan
- Siot, Jérémie
- Sirois, Carole
- Six voix solistes
- Sixtrum
- Skull, Colleen
- Slapcoff, Robert
- Slean, Sarah
- Sloat, Kathryn
- Słyż, Aleksandra
- Smalley, Denis
- Smetana, Bedřich
- Smith, Andrew Christopher
- Smith, Linda Catlin
- Smith, Michel A
- Smolders, Ios
- Smolders, Jos
- Smyth, Ethel
- Smythe, Cory
- Snæbjörnsdóttir, Bergrún
- Société de musique contemporaine du Québec
- Soddell, Thembi
- Sodeika, Gintaras
- Söderström, Elin
- Sohal, Naresh
- Sokolović, Ana
- Solal, Gaëlle
- Solawa
- Soli-Tutti
- Solistes de Lyon
- Solistes des chœurs de l’ORTF, Les
- Soly, Geneviève
- Somers, Harry
- Sondheim, Stephen
- Song, Wonny
- Sonstevold, Gunnar
- Sontaient trois
- Sosa, Raoul
- Sound of the Mountain
- Souster, Tim
- Southam, Ann
- Southière, Audrée
- Sørensen, Bent
- Sørlie, Stine
- Sparnaay, Harry
- Spicer, Daniel
- Spicer, Virginia
- Spin Ensemble
- Spiteri, Vivienne
- Splice
- St John, Lara
- St-Arnaud, Francis
- St-Hilaire, Frédéric
- St-Jacques, Sylvie
- St-Jak, Pierre
- St-Jak Quartet Off-On
- St-Jean, François
- St-Onge, Alexandre
- St-Onge, Antoine
- St-Pierre, Aude
- St-Pierre, Steeve
- Stahnke, Manfred
- Staier, Andreas
- Stalvey, Dorrance
- Standing Wave
- Staniland, Andrew
- Stanović, Adam
- Stark, Bruce
- Stawarska-Beavan, Magda
- Stec, Andrzej
- Steen-Andersen, Simon
- Steenhuisen, Paul
- Steeves, Tim
- Steffler, Paul
- Stenhammar, Wilhelm
- Steppe
- Stévance, Sophie
- Steven, Donald
- Stevenson, Robert W
- Stewart, Amanda
- Stewart, D Andrew
- Stewart, Will
- Stibilj, Milan
- Still
- Stjarnell, Anna Maria
- Stockhausen, Karlheinz
- Stoll, Magali
- Stone, Simon
- Stonehouse, Jeffrey
- Storring, Nick
- Story, Colin
- Strada
- Straesser, Joep
- Straffelini, Nicola
- Strauss, Axel
- Strauss, Richard
- Stravinski, Igor Fiodorovitch
- Streatfeild, Simon
- Strizich, Robert
- Structural Damage
- Studio de musique ancienne de Montréal
- Stuhlmann, Andreas
- Subirana, Émile
- Subtle Lip Can
- Sueyoshi, Yasuo
- Suparta, I Dewa Made
- SuperNova String Quartet
- Supernova4
- Supponen, Lauri
- Sura, Alexandru
- Sutton, Benjamin
- Suzuki, Dean
- Sveen, Hans Knut
- Swanson, Robyn
- Swift, Daniel
- Swinnen, Peter
- Swoboda, Victor
- Sylvestre, Alexandre
- Sylvestre, Daniel
- Sylvestre, Gaston
- Szabó, Krisztina
- Szeto, Jennifer
- Szlavnics, Chiyoko
