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Streaming is now the main way most people listen to music. Whether it comes from your phone, a laptop or a dedicated streamer, digital audio must eventually be turned back into an analogue signal — and every step of that path affects quality and convenience.
Lossy, lossless and hi-res
| Type | Examples | What it means |
|---|---|---|
| Lossy | MP3, AAC, Ogg Vorbis, Opus | Removes data judged least audible to shrink files. At high bitrates, hard to tell from the original. |
| Lossless (CD quality) | FLAC, ALAC, WAV, AIFF — 16-bit/44.1 kHz | Bit-perfect copy of the original. Identical to the CD. |
| Hi-res | FLAC/ALAC at 24-bit and 48–192 kHz | More resolution than CD. Mostly useful for production; audible benefits in playback are debated. |
Several major streaming services now offer lossless and hi-res tiers. If you use good headphones or speakers, lossless removes any doubt about compression — but improving speakers, placement or the room usually brings bigger gains than the jump from CD quality to hi-res.
What a DAC does
A DAC (digital-to-analogue converter) turns digital samples into a continuous electrical waveform. Every phone, laptop, TV, soundbar and wireless headphone contains one. A dedicated DAC can bring lower noise, more output power for headphones, better connectivity and features like balanced outputs.
USB dongle DAC
A tiny DAC/amp that plugs into a phone or laptop. Brings back a headphone jack with cleaner, stronger output.
Desktop DAC/amp
A DAC and headphone amp in one box, often with line outputs to powered speakers.
Standalone DAC
Feeds an amplifier from a CD transport, TV, streamer or computer via USB, optical or coax.
DAC in amp or streamer
Many integrated amps and streamers include a good DAC — often the simplest option.
Sample rate and bit depth
Sample rate (e.g. 44.1 kHz) is how many times per second the waveform is measured. It sets the highest frequency that can be stored — roughly half the sample rate, so 44.1 kHz covers up to about 22 kHz, beyond the limit of human hearing.
Bit depth (e.g. 16-bit) is how precisely each sample is measured. It sets the dynamic range: about 96 dB for 16-bit and about 144 dB theoretically for 24-bit — far more than any room or amplifier can reproduce.
Ways to stream at home
| Method | Quality | Notes |
|---|---|---|
| Bluetooth | Lossy (codec-dependent) | Universal and easy; the phone must stay nearby. |
| AirPlay 2 | Lossless (CD quality) | Great for Apple users; multi-room. |
| Google Cast / Chromecast | Up to hi-res on supported apps | Cast from many apps on Android/iOS. |
| Spotify / Tidal / Qobuz Connect | Service-dependent | The device streams directly; your phone is just a remote. |
| Network streamer + app | Lossless / hi-res | Dedicated box connected to your DAC or amp. Supports services and your own library. |
| Roon / UPnP / DLNA | Lossless / hi-res | For large local music libraries stored on a computer or NAS. |
Network streamers
A network streamer connects to your home network (Ethernet or Wi-Fi) and plays music from streaming services, internet radio and your own files. Some have a built-in DAC and analogue outputs; others (“streaming transports”) output digital audio to an external DAC. Ethernet is usually more reliable than Wi-Fi for hi-res streams.
Digital audio players (DAPs)
A DAP is a dedicated portable music player — like a modern iPod for enthusiasts. Many run Android so they can use streaming apps, have powerful headphone outputs, balanced jacks, and microSD slots for large libraries. They make sense if you use demanding wired headphones or IEMs on the go and want to keep your phone’s battery for other things.
Connections: USB, optical, coaxial
- USB: the standard for computers and phones. Supports hi-res.
- Optical (TOSLINK): common on TVs and consoles; electrically isolated, which can prevent ground-loop hum. Many devices support it up to 24/96.
- Coaxial (S/PDIF): RCA-type digital connection, often up to 24/192.
- HDMI ARC/eARC: carries audio from the TV to an amp or soundbar, including surround formats.
Getting the best from streaming
Choose a lossless tier
If your service offers it and your gear is good, turn it on in the app settings (including for Wi-Fi and download quality).
Turn off loudness normalisation — or leave it on
Normalisation keeps tracks at similar volume. Off preserves album dynamics; on is nicer for shuffled playlists.
Avoid double processing
Disable “enhancers” on phones and computers unless you like them; set EQ in one place only.
Use Ethernet for fixed streamers
Fewer dropouts and faster control.
Frequently asked questions
Can people hear the difference between CD quality and hi-res?
In controlled blind tests, differences are very small or inaudible for most listeners with properly produced files. Differences in mastering between versions are often much larger than the format itself.
Do I need an external DAC?
Not always. If your source sounds clean and loud enough, you may not. External DACs help when a device has noise, weak headphone output, missing connections, or when you want features like balanced outputs.
Is Wi-Fi streaming better than Bluetooth?
Usually yes. Wi-Fi has enough bandwidth for lossless audio and the device streams directly from the internet, so your phone’s battery, calls and notifications don’t interrupt playback.
What is bit-perfect playback?
It means the audio data reaches the DAC unchanged — no resampling, volume changes or effects in software. Some apps and operating systems offer exclusive or bit-perfect modes.