    // Just need a context to create nodes on, so any allowed length and
        // rate is ok.
        let context = new OfflineAudioContext(1, 1, 48000);

        let success = true;

        for (let count = 1; count <= 32; ++count) {
          let convolver = context.createConvolver();
          let buffer = context.createBuffer(count, 1, context.sampleRate);
          let message = 'ConvolverNode with buffer of ' + count + ' channels';

          if (count == 1 || count == 2 || count == 4) {
          