The trial starts Thursday for Fazil Say, who has played with the New York Philharmonic, Berlin Symphony Orchestra and others. His tweets included one that joked about a call to prayer that lasted only 22 seconds.
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Say tweeted: `Why such haste? Have you got a mistress waiting or a raki (alcoholic drink) on the table?'
Islam forbids alcohol and many Islamist consider the remarks unacceptable.