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In Reply to: RE: Hi-res streaming comes to my car, finally! posted by zacster on January 06, 2025 at 17:16:20
Good progress! Does the vehicle support bluetooth? At the very least this would allow you to stream any audio from your phone to the car's audio system via bluetooth.... including music streaming. It won't be 'hi-res' but in a car does it really matter?
Colorado just passed a law that went into effect this month that requires drivers to be hands-free on their phones. We're behind many other States in that regard but I thought CA required it a long time ago and that would mean bluetooth audio in the car.
Follow Ups:
It won't be 'hi-res' but in a car does it really matter?
I already have difficulty with wide dynamic range content rendered in MP3 in the Passport. The noise level buries subtle detail.
For me, it's "why bother?"
DBX compressors. i have a model 119 that if used judiciously would be just the ticket for a car. i used t at 1.4:1 to encode reel to reel tape and then would expand at the same rate for nice quiet playback. that it didn't use extreme eq as in DBXII made it better for my uses plus, if you didn't expand on playback or played it at a friend's house where no DBX lived, it STILL sounded pretty normal.
DBX disc LPs were ungodly quiet but never became ubiquitous but I have a few that I would like to play. am not sure my DBX122 is functional.
...regards...tr
You CAN get reasonably decent sound from higher bit-rate source material sent via bluetooth.I simply sent 'hi-res' from my iPhone (Tidal/Qobuz/Rips) via CarPlay/USB to the car's internal DAC (fully lossless) but Bluetooth is a viable option for those who don't have much choice.
Edits: 01/10/25 02/19/25
Even with lossy MP3, the ambient noise level of the car and poor "listening room" environment negates any real gains from high rez content.
I did an experiment almost 15 years ago with my iPod and BMW 135i stereo.I had 256kbps AAC* albums downloaded from the Apple iTunes store along with a few of my own lossless CD rips on the iPod. The iPod was connected into the BMW's audio system through a BMW proprietary Y cable. This provided control via steering wheel buttons and buttons on the stereo head unit. This was a decade before we had Apple CarPlay or Android Auto.
I could hear the difference between the downloaded AAC and my own lossless CD rips while sitting in the quiet car w/o the engine running but it wasn't like AAC was bad. It was very good but there was a noticeable difference vs my lossless rips. There was no discernible difference while driving.
I then tried Bluetooth which muddied the audio a bit but it was still acceptable while driving.
iPod under BMW arm rest connected via BMW Y-Cable
BMW 135i interior
The car
That was one of my Lockheed customers in the background. Always a fun drive getting there!
*The Advanced Audio Coding (AAC) codec was developed by a collaboration of several companies, including: Bell Labs, Fraunhofer IIS, Dolby Laboratories, LG Electronics, NEC, Panasonic, Sony Corporation, ETRI, JVC Kenwood, and Philips. MP3 had severe audio quality limitations that were significantly improved upon in AAC.The development of AAC began in the late 1980s and early 1990s. The goal was to create a more efficient audio coding standard that could improve on the MP3 format. AAC was released in 1997 and became part of the MPEG-2 standard. Apple was an early adopter of AAC which became the default format for iTunes music downloads and FaceTime video conferencing. But there was an AAC licensing fee that Apple was willing to pay while other brands stayed with inferior MP3. YouTube uses AAC as well.
When people say MP3 sucks, they're right! AAC sounds much better but losssless CD quality in FLAC, ALAC, AIFF, or WAV are better yet.
Edits: 01/11/25
my daily drivers, the ST1300 bike and S2000 are not exactly great environments with their relatively high noise (but fun!) levels. The CD changer in the 24 year old Honda became flaky a while back and now doesn't work.
I just listen to radio - but even then not on the expressway where the door mounted speakers are barely audible.
I acknowledge that the audio tests I did in my BMW 135i might not be as applicable in a tranquil luxury car with a quieter cabin.
Here's what I'm not quite understanding. Some Sirius XM channels can sound very good in some cars even though the satellite stream is highly compressed. But I digress. I let my Sirius XM free trial expire.
I tried SiriusXM in my car for 3 months and thought the SQ was awful. Worse than FM radio and worse than BT from my iPhone. My experience is that there is so much noise inside any car I have owned that hi-res is a waste of resources. I don't expect much, but XM was beneath even that low bar. Maybe I need quieter cars.
It's unfortunate, because I found the content on XM to be eclectic and interesting. I mostly listened to BB King's Bluesville and Little Steven's Underground Garage. The few jazz channels were meh, mostly smooth jazz/fusion stuff. Sometimes I would scan for something to catch my ear. World Music or Latin or Reggae or R&B - there are a lot of choices if you are open-minded.
Fortunately I live in a place where there's still good radio. Or else I use Roon ARC, which mostly works but can be erratic.
. . . in theory, practice and theory are the same; in practice, they are different . . .
I agree that most XM channels don't sound very good but there were a few that weren't bad and I'm not understanding why. I wonder if they allocate more bandwidth to some channels.
from my perspective. Along with randomly playing MP3 content as background music while driving the Passport.
Edits: 01/11/25
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