I've had my 4100 now for almost a month, and overall, I love the head unit. Auto-EQ did a great job of setting the sound environment in my Equinox, and I hear a great deal more sound separation than when I had my stock radio installed. Android Auto installed easily and connected to my N6 with no issues, and for the first iteration, works pretty well. I've the same complaints about Google Music that others have expressed here, relative to browsing and searching, and there is always hope that it will improve.
One thing I've discovered is that the volume when I first use AA is really loud. My volume level could be set at 2, and it blasts me out of the car. However, if I start Music first, and the switch to setting my destination for my drive, the volume level drops to where it should be. I haven't figured out if this is caused by the head unit, AA itself, or the installation of the steering wheel controls wiring harness (Best Buy kinda jacked the installation). Has anyone else experienced this?
I have my music library uploaded to Play Music and rarely keep music on my phone. I've yet to have success using the voice search to play an album from my library. Does anyone know if that actually works?
Thanks in advance.
I've observed the same thing with the AA Google Nav sound. (I did my own installation, and I'm sure I've got it installed correctly per the wiring diagrams from my interface kit.) I don't get blasted by the voice, but it is a bit loud. She seems to ignore volume controls unless playing music.
As far as the music library and calling up albums, I have no problems there. (Disclaimer: I'm a Google Play All Access subscriber, so I have access to more than just my own music.) One thing that might be a factor for you (or others that have the same issue)... Does all of your music have the proper metadata (i.e. tags) applied to it? If you ripped your music from CDs or didn't purchase it from legit sources, it probably doesn't have proper tags for Artist, Album, Track #, Genre, Year, embedded Album Art, etc. In order for Voice Search to be able to find it, it has to be able to read the MP3 metadata, so it can properly index the music.
I made sure all of my music was properly tagged (using a good tag editor) prior to uploading it to Google Play Music. You can edit the tags with Google Play Music (from your desktop), but it's not as easy to do bulk editing as with a more robust music manager (like Media Monkey, etc.).
The only time I've run into problems with calling up a specific album or song is when the album title matches a particular song (sometimes on the same album and sometimes not). For example Michael Jackson's "Thriller" (both a song and an album title). Google Play Music will sometimes be unpredictable with what it will do. I've had it bring up the album "Thriller" and start playing the first track of that: "Wanna Be Startin' Something". Other times, it has actually brought up the song "Thriller" and started playing it.
Another observation: Since, Voice Search doesn't recognize asking for both the artist and title at the same time (i.e. "Play Michael Jackson Thriller" or "Play Thriller by Michael Jackson"), you have to ask for either the artist or the song. If you ask for the artist, Play Music will queue up a selection of songs by the artist (as you would expect). If you ask for the song, Play Music will play the song and then queue up a selection of music tracks to follow it that are similar in genre, but not necessarily by the same artist. Essentially, it will create a "Radio Station" based on the song title. (Again, this is only applies if you're a Google Play All Access subscriber.)
In either case, whether it properly grabs music from your library or not is probably dependent on the tags in the MP3s you uploaded.