You can connect the two devices, but you are right, aptX-Lossless cannot be transmitted.

To change the Bluetooth format on the iFi Audio Zen Air Blue, you can use the device's built-in settings and buttons. Here are the steps: - Connect the Zen Air Blue to your Bluetooth device. - Use the front panel buttons to navigate through the settings. Specifically, you need to access the 'Bluetooth Format' or 'Bluetooth Codec' selection. - The Zen Air Blue supports various Bluetooth codecs such as AAC, aptX, aptX HD, and LDAC. You can cycle through these codecs using the buttons on the device. - For detailed instructions, refer to the user manual or the manufacturer's official website, as the exact button sequence may vary. Typically, you would press and hold a button (often the 'i' button or a similar settings button) to enter the settings menu, and then use other buttons to select the desired Bluetooth codec.

When choosing a Bluetooth format for the iFi Audio Zen Air Blue, several factors should be considered, especially since you are connecting it to an old but good receiver via RCA (cinch) cables. ### Key Considerations - Sound Quality: If you prioritize high-resolution audio, you should opt for formats that support higher bitrates and better sound quality. - Device Compatibility: Ensure the format is supported by both your source device (e.g., smartphone, tablet) and the Zen Air Blue. ### Recommended Formats - LDAC: This format is highly recommended for its ability to transmit high-resolution audio at up to 24-bit/96kHz. It is supported by the Zen Air Blue and offers excellent sound quality. - aptX HD: This format also supports high-resolution audio up to 24-bit/48kHz and is a good alternative if your source device does not support LDAC. ### Other Formats - aptX Adaptive: This is a versatile format that adjusts bitrate based on the connection quality, ensuring a stable and high-quality audio stream. However, it may not always reach the same high resolution as LDAC or aptX HD. - AAC, SBC, aptX: These formats are more general and may not offer the same level of sound quality as LDAC or aptX HD, but they are widely supported and can be used if the other formats are not available. ### Conclusion For the best sound quality when connecting to your old receiver via RCA cables, LDAC or aptX HD would be the optimal choices, provided your source device supports these formats. If not, aptX Adaptive is a good fallback option for a balance between sound quality and stability.

hello thomas it doesn't look like that in my opinion, have a look at tidal and ifi. there are apparently devices from ifi that can connect to tidal, but this device that i'm talking about doesn't seem to. for me, the question doesn't arise because i operate tidal via my smartphone and connect it to the ifi zen, which is connected to my hi-fi system, via bluetooth.