   let name = k + ': ' + config.filterType;
        audit.define(
            name,
            testWithBiquadFilter(
                config.filterType, config.errorThreshold, config.snrThreshold));
      }

      audit.define('multi-channel', (task, should) => {
        // Multi-channel test.  Create a biquad filter and the equivalent IIR
        // filter.  Filter the same multichannel signal and compare the results.
        let nChannels = 3;
        let context =
            new OfflineAudioContext(nCha