The Spoken Turkish Corpus Demo Version (std_demo) is ready for inspection and non-commercial use by researchers.
The corpus presents a total of 18 selection of audio recordings and archives from Radyo ODTÜ. The recordings in std_demo have been analyzed only for basic transcription and certain discursive features. Some quantitative and qualitative features of the corpus are provided in Main Features of STC Demo Version page.
For more info see: http://std.metu.edu.tr/en
Here is another related blog entry.