if (format) {
                if (_waveFormat->Format.nChannels == 1) {
                    _waveFormat->Format.nChannels = 2;
                } else {
                    _waveFormat->Format.nChannels = format->channelCount;
                }
                _waveFormat->Format.wBitsPerSample = format->bitsPerSample;
                _waveFormat->Format.nSamplesPerSec = format->sampleRate;
                _waveFormat->Format.wFormatTag = 1;
                _waveFormat->Format.nBlockAlign = _waveFormat->Format.nChannels * format->bitsPerSample / 8;
                _waveFormat->Format.nAvgBytesPerSec = format->sampleRate * _waveFormat->Format.nBlockAlign;
                _waveFormat->Format.cbSize = 0;
                _waveFormat->Samples.wValidBitsPerSample = format->bitsPerSample;
                hr = _pAudioClient->IsFormatSupported(AUDCLNT_SHAREMODE_SHARED, (WAVEFORMATEX *)_waveFormat, &match);
                if (hr != S_OK) {
                    LOG(ERROR) << "Wave format provided not supported by sound card";
                    throw - 1;
                }

            } else {
                // A format wasn't requested, but we want to minimum force 48k and 32-bit.
                // if 32-bit isnt supported, request 16-bit
                if (_waveFormat->Format.nSamplesPerSec != 48000) {
                    // Attempt 48k, if we cant, BAIL
                    LOG(TRACE) << "Default is not 48k rate, attempting 48k....";
                    _waveFormat->Format.nSamplesPerSec = 48000;
                    _waveFormat->Format.nAvgBytesPerSec = _waveFormat->Format.nSamplesPerSec * _waveFormat->Format.nBlockAlign;
                    // REQUEST IT

                    hr = _pAudioClient->IsFormatSupported(AUDCLNT_SHAREMODE_SHARED, (WAVEFORMATEX *)_waveFormat, &match);
                    if (hr != S_OK) {
                        // Try 24k
                        _waveFormat->Format.nSamplesPerSec = 24000;
                        _waveFormat->Format.nAvgBytesPerSec = _waveFormat->Format.nSamplesPerSec * _waveFormat->Format.nBlockAlign;
                        if (hr != S_OK) {
                            LOG(ERROR) << "Sound card hardware must support at least 24k or 48k sample rate";
                            throw - 1;
                        }
                    }
                    SAFE_CO_FREE(match);
                }
                if (_waveFormat->Format.wBitsPerSample != 32) {
                    // Try to request 32-bits
                    LOG(TRACE) << "Default is not 32-bit PCM, attempting 32-bit...";
                    _waveFormat->Format.wBitsPerSample = 32;
                    _waveFormat->Format.nBlockAlign = _waveFormat->Format.nChannels * _waveFormat->Format.wBitsPerSample / 8;
                    hr = _pAudioClient->IsFormatSupported(AUDCLNT_SHAREMODE_SHARED, (WAVEFORMATEX *)_waveFormat, &match);
                    if (hr != S_OK) {
                        // It didnt support 32-bit, just use 16-bit
                        LOG(TRACE) << "falling back on 16-bit PCM";
                        _waveFormat->Format.wBitsPerSample = 16;
                        _waveFormat->Format.nBlockAlign = _waveFormat->Format.nChannels * _waveFormat->Format.wBitsPerSample / 8;
                    }
                    SAFE_CO_FREE(match);
                }
            }