Lossless on the Display – But Is the Sound Really Lossless?

The Invisible Journey of Modern Hi-Fi Streaming

We choose an album on our phone, tap the play icon, and a few moments later the words "Lossless" or "Hi-Res" appear on the amplifier's display. At first glance, everything seems to be in order: the streaming service promises excellent quality, the equipment recognises the high-resolution stream, and all that remains is to sit back and listen.

The reality, however, is more complex.

It matters whether the phone is actually sending the music or merely acting as a remote control. It matters which protocol carries the signal, whether the audio is compressed or converted along the way, and how the digital data is eventually turned into an analogue signal.

In a modern streaming system, most of the music's journey is invisible. This makes it easy to assume that the format shown on the display also guarantees the quality we hear. In reality, "lossless" describes only one section of the signal path – not the entire system.

Where Is the Music Actually Coming From?

In a traditional hi-fi system, the signal path is easy to follow. A CD player reads the disc, a turntable cartridge follows the groove, and a tape head senses the magnetic information stored on the tape. The source is physically present in front of us.

During streaming, the music file is usually stored on a remote server. A phone, computer or network player requests the data through an internet connection. The most important question is therefore not which device we used to select the album, but which device is actually downloading and processing the music stream.

There are two fundamentally different methods.

In the first case, the phone or computer is the actual player. It receives and processes the music before forwarding it to the hi-fi system through another connection.

In the second case, the phone acts only as a control interface. It tells the network player or amplifier what we want to hear, and the hi-fi component connects directly to the streaming service. The phone can even be switched off while playback continues uninterrupted.

The two methods may look almost identical from the listener's perspective, but technically they are very different.

Bluetooth – Convenient, but Not Always True Hi-Fi

The simplest advantage of Bluetooth is that it works with almost every phone and audio device. It requires no shared home network, dedicated control application or complicated setup. We pair the devices, and a few seconds later the music begins.

In this situation, the phone is usually the player. It processes the audio received from the streaming service and encodes it using a Bluetooth codec so that it can be transmitted wirelessly.

This means that even if the phone receives a lossless music file, another conversion may take place before the signal reaches the hi-fi system. The quality of the connection is always determined by the codec supported by both the transmitting and receiving devices. If one supports an advanced format while the other only understands a basic codec, the connection falls back to the lower common standard.

Modern Bluetooth solutions have improved considerably and can sound surprisingly good in everyday use. Even so, we should not automatically regard every Bluetooth connection as lossless.

In a serious hi-fi system, Bluetooth is best treated as a convenient addition rather than a guaranteed reference source. It is excellent for background listening, quickly connecting a guest's phone or casual use. If we want to hear the full potential of the system, direct network playback or a wired digital connection will usually provide a better foundation.

AirPlay and Chromecast – More Than Bluetooth, but Not Without Limits

AirPlay and Chromecast use the home network. This can provide a more stable connection and offer better transmission possibilities than Bluetooth, but the exact behaviour depends on the application, receiving device and protocol version being used.

With these systems, we cannot assume that the resolution shown by the streaming service is necessarily the resolution reaching the amplifier or DAC. During transmission, the audio may be converted to a standard format or sample rate. The result may still sound very good, but the signal arriving at the player is not always identical to the original stream supplied by the service.

AirPlay offers simple operation and convenient integration between Apple devices. Chromecast works with a wide range of products and applications and, in certain configurations, allows the network player itself to take over playback.

The important point remains the same: the Hi-Res label shown inside an application does not reveal exactly how the music reaches the amplifier or DAC.

With Connect, the Phone Becomes a Remote Control

Spotify Connect, TIDAL Connect and Qobuz Connect follow a different approach. We choose the music and playback device on the phone, but the audio stream does not necessarily pass through the phone itself.

A compatible streamer, network amplifier or active loudspeaker connects directly to the streaming service. The phone sends control commands for starting playback, pausing, changing tracks or adjusting the volume.

This has several practical advantages. An incoming call does not interrupt the music, notifications are not mixed into playback, and the phone's battery is placed under less strain. More importantly, the network component can use its own playback system, designed specifically for this purpose.

This generally provides a cleaner and more predictable signal path. However, seeing the appropriate Connect logo on a product is not enough. We must also check the maximum resolution it can receive, whether it supports the service's latest formats, and whether the necessary firmware is installed.

A product may therefore support Spotify Connect without supporting Spotify's lossless stream. The logo confirms access to the service, but not necessarily to every present or future quality level it may offer.

What Does Lossless Really Mean?

Lossless compression means that the original digital data can be reconstructed completely from the compressed file. This differs from lossy formats, which permanently remove certain information to reduce file size.

Lossless is therefore a meaningful and valuable quality standard. What it does not tell us is whether the recording itself is good.

A track may be offered in 24-bit/192 kHz while still originating from an overdriven, dynamically compressed or poorly balanced master. A carefully recorded and mastered CD-quality version can often sound more natural and enjoyable than a higher-resolution release produced with less care.

Bit depth and sample rate are not scores for musical quality. They are technical parameters that define how a digital signal can be stored and processed. They do not guarantee a better performance, better microphone placement or more thoughtful mastering.

The benefits of high-resolution audio can only be retained when the entire playback chain handles it correctly. If the phone, operating system, application or network protocol converts the signal, the original file format displayed by the service may no longer match what actually reaches the DAC.

Not All Digital Volume Control Is the Same

In streaming systems, we often adjust the volume from a phone. This is convenient, but it is not always clear which component is performing the attenuation.

In a Connect system, the phone may simply send a control command to the player. In other situations, the level of the digital signal may be reduced at the source device. Heavy digital attenuation can have a technical cost, especially when simpler processing or limited internal resolution is involved.

In a more serious system, it is worth checking whether a fixed-level digital output can be used, leaving volume control to the amplifier or preamplifier. This is not mandatory in every setup, but it can prevent the signal from being modified unnecessarily at several points in the chain.

Volume normalisation can also affect the result. This feature attempts to make different albums and tracks play at a similar perceived level. It is useful for playlists, but during critical listening it is worth comparing the sound with normalisation switched off.

The Story Does Not End at the DAC Chip

It is often assumed that once the digital data reaches the DAC correctly, the question of sound quality has largely been settled. In reality, this is where the second half of the process begins.

The quality of digital-to-analogue conversion is not determined by the DAC chip alone. Clock management, power supply design, circuit layout, the analogue output stage and the quality of the surrounding components are equally important.

Two devices may receive exactly the same digital stream and still sound different. This is not because one can somehow "hear more bits", but because each converts and delivers the analogue signal in a different way.

This is also why a more expensive streamer may offer more than a better application or a larger display. A carefully designed power supply, lower noise floor, superior analogue output stage and stable overall architecture can make a real difference.

Replacing the entire network player is not always necessary. If an existing streamer provides a reliable digital output, an external DAC can significantly improve the analogue side of the system. In another setup, the streamer's internal DAC may be the better choice. The right answer depends on the complete system, not on the logo printed on a particular chip.

The Network Is Part of the System – but It Is Not Magic

Streaming requires a stable network connection. Weak, overloaded or frequently interrupted Wi-Fi can cause buffering, delays and playback errors. Reliable connectivity becomes even more important with high-resolution material.

This does not mean that every network problem requires an exotic audiophile cable. The fundamentals should always come first: a suitable router, good wireless coverage, sensible network configuration and, where necessary, a wired Ethernet connection.

The most important quality of a well-functioning network is not that it changes the tonal character of the system, but that it delivers the data continuously and without errors.

An old technical principle remains valid even in digital hi-fi: first eliminate the fault that can be identified and demonstrated, and only then begin discussing fine-tuning.

An Older Streamer May Still Work – but It Can Be Left Behind

Traditional amplifiers and CD players can remain usable for decades when properly maintained. Network components introduce another factor: software support.

The electronics inside a streamer may still work perfectly while its control application no longer runs on a new phone, the manufacturer has stopped releasing updates, or a streaming service has changed its connection requirements.

When choosing a network player, it is therefore not enough to examine its DAC, connections and supported resolutions. The manufacturer's software history, support for third-party control systems, standard network protocols and the product's usability after an individual service changes are equally important.

One of the major questions in digital hi-fi is no longer simply how good a product sounds when new, but how useful it will remain five or ten years later.

Which Connection Should We Choose?

There is no single perfect solution for every situation.

Bluetooth is quick and universal, making it ideal for casual or background listening. AirPlay and Chromecast provide convenient network connectivity, but the format and resolution being transmitted depend on how the individual devices work together.

When predictable sound quality is the priority, the streaming provider's own Connect system or the network player's native application is generally the best starting point. The player then receives the music directly, while the phone simply controls the process.

For more critical listening, it is worth checking:

• the quality in which the service offers the selected recording;
• whether the player supports that resolution;
• whether the streamer connects directly to the service;
• whether sample-rate conversion occurs anywhere in the signal path;
• whether volume normalisation is enabled;
• which component performs the digital-to-analogue conversion;
• whether the network connection is stable;
• and whether the player's firmware is up to date.

These details reveal more about the system's real performance than a single Hi-Res label.

Good Streaming Is Not About the Largest Numbers

Modern network playback has given music lovers remarkable freedom. Within seconds, we can access almost any album, compare different releases and discover recordings we may never have encountered in a physical format.

This is genuine progress – but only if we understand what is happening behind the scenes.

The lossless label matters, but it is not final proof of sound quality. The result is not determined by a single format, application or DAC chip, but by the complete journey: from the recording and streaming service through the network and player to the amplifier and loudspeakers.

The best system is therefore not necessarily the one that displays the highest resolution. It is the one that delivers the music with the least uncertainty, stable operation and genuine musical involvement – because that is what all this technology was created for in the first place.

Author: Norbert Somogyi