am 9017e5e0: Increase normal mixer\'s pipe to fast mixer

        // create a MonoPipe to connect our submix to FastMixer

        NBAIO_Format format = mOutputSink->format();

        // frame count will be rounded up to a power of 2, so this formula should work well

        MonoPipe *monoPipe = new MonoPipe((mNormalFrameCount * 3) / 2, format,

                true /*writeCanBlock*/);

        // This pipe depth compensates for scheduling latency of the normal mixer thread.

        // When it wakes up after a maximum latency, it runs a few cycles quickly before

        // finally blocking.  Note the pipe implementation rounds up the request to a power of 2.

        MonoPipe *monoPipe = new MonoPipe(mNormalFrameCount * 4, format, true /*writeCanBlock*/);

        const NBAIO_Format offers[1] = {format};

        size_t numCounterOffers = 0;

        ssize_t index = monoPipe->negotiate(offers, 1, NULL, numCounterOffers);