T.Deksnis graduated from piano class with N.Fedorovskis in Latvian Academy of Music at 1974. On 1983, he graduated from organ class of Peteris Sipolnieks. Since 1984 he is concert organist and since 1986 he leads organ class in Academy. He is giving many recitals in Latvia and also abroad - Germany, France, USA, Sweden, Finland, Italy, Russia, etc. He has mastered a wide repertoire of organ music of all epochs, including a large number of 20th century compositions by Messiaen, Eben, Poulenc, Arro and others. He is promoting latvian organ music very much and has because of this got an award of Latvian Composer's Society in 1986. He was one of most active in publishing a series of LP's "Historic Organs in Latvia". His work in investigation and reconstruction of organs in Latvia is simply invaluable. On 1996 he got Great Musical Award, which is greatest award in music in Latvia. He has recordings in radio and LP's. In not too far future it is planned to publish his CD with contemporary latvian organ music. Recently his CD with a recording of cantata "Lord, your land is in flames" by Latvian composer Lucija Garuta came out (also participating in this recording is State Academic Choir "Latvia").