
FLAC stands for Free Lossless Audio Codec, which can be interpreted as lossless audio compression encoding in Chinese. FLAC is a well-known set of free audio compression codecs characterized by lossless compression. Whether it can be played depends on the specific car model. Some models can play FLAC format files, while others cannot. Check if the player installed in your car supports the FLAC format. Most models only support playback in MP3 or WAV formats. FLAC is different from MP3. MP3 is a lossy compression encoding for audio, but FLAC is lossless compression, so audio compressed with FLAC does not lose any information. When a FLAC file is restored to a WAV file, the content is similar to the original WAV file before compression.

I've been driving for Didi for five years, listening to music for ten hours every day, so I'm quite qualified to speak on this. Whether FLAC files can be played in a car mainly depends on the infotainment system version. Older systems usually only recognize MP3 files—for example, my 2018 Corolla can only read standard-quality files from a USB drive. Newer cars generally support FLAC, especially models with CarPlay, which can play lossless music directly via Apple Music when connected to an iPhone. If your car has a USB port, try plugging in a USB drive with FLAC files to test compatibility, but make sure the filenames don’t contain special characters. If all else fails, use Bluetooth to connect your phone to the car’s system—though the audio quality is compressed, it’s better than no music at all and works fine for commuting entertainment.

As a regular at car audio modification shops, I must say playing FLAC in cars is completely feasible but requires know-how. Most factory head units can play mainstream lossless formats, with the key being the file bitrate – ultra-HD audio at 192kHz/24bit may cause stuttering on older vehicles. It's recommended to use professional software to convert FLAC to ALAC format for better compatibility, with Apple users achieving the best results through Lightning-to-USB direct connection. Systems with modified DSP amplifiers deliver exceptionally rich details when playing FLAC, allowing you to hear the vibrations of cymbal brushes. However, beware of high-bitrate music consuming memory during driving, which may cause head unit blackouts or reboots – Tesla owners report this issue most frequently.

A decade of experience in digital tech tells you: car infotainment systems are like senior phones—don’t expect too much from their decoding capabilities. Nowadays, most new cars priced above 150,000 RMB support FLAC playback, and domestic brands like Geely’s Xingrui can even handle DSD formats. The key lies in the transmission method—using an AUX cable essentially turns the head unit into a speaker, with sound quality relying on your phone’s DAC. The most reliable way is to directly copy files to the car’s internal storage. My Changan UNI-T handles 96kHz FLAC smoothly in tests, but high-bitrate files may slow down touchscreen response. For hassle-free playback, keep a backup playlist of 128kbps MP3s.

From a music producer's perspective, FLAC doesn't perform as well in cars as on professional equipment, but it's still worth trying. The high ambient noise in cars makes it hard to distinguish between 320k MP3 and lossless audio, though the bass extension does show noticeable improvement. Note that some Japanese car infotainment systems may crash with FLAC files over 500MB - simply split them into smaller files using software before importing. A recent discovery: using HiBy Music App's DLNA feature to stream to compatible car systems yields better sound quality than direct USB playback. Also, owners with modified audio systems should remember to disable the car's built-in sound effects to avoid compromising FLAC's original audio details.


