that ra cai' TC-350 Effect chi~ dung` cho Guita hoat. Piano thi` okay nhung dung` cho hat' karaoke thi` khong co' hay lam'''''' vi` am thanh khong co' du~ manh. cho hat' karaoke va` lam` show nen su~ dung. MicroVerb4 tot' hon Tc-350 nhieu`do' la` theo kinh nghiem cua minh`