One of the disappointing trends for me with new phones is the lack of a 3.5mm headphone jacks. However, given the popularity of wireless headphones and the large market share of Apple devices I expect the trend to continue and headphone jacks to be found on fewer and fewer phones in the future.
I imagine that I'm in the minority of users who use neither streaming services or Bluetooth headphones. My music is usually high bit rate FLAC, ACC or MP3 depending on when I ripped it. My initial listening on the included 3.5mm DAC was not promising. A lack of dynamic range and low volume even on efficient in ear monitors (IEMs) made me think about finding a replacement.
The problem is there aren't at lot of options for small passive DACs. And my bet is that most of the current phones with no 3.5mm jack use the same chipset that Essential uses - the Conexant CX20985 for their headphone adapters. (For more info - see the AnandTech article - Conexant Introduces USB-C Digital Audio Compliant Chips.)
So that lead me to see if perhaps there was something that could be done in software. Based on my limited research it would appear that Android above version 5.0 has a built in USB to DAC driver. It also appears that this is what Essential uses to access the USB adapter. However, this driver is quite limited. Consistent with what I heard, the driver resamples everything to 16-bit 48kHz and limits the dynamic range. (For more info see extreamsd.com and their USB audio driver page.)
Good news! There are several music player applications on GooglePlay that are capable of natively recognizing the Essential DAC over USB. The difference in sound quality, volume and dynamic range is like night and day. The most polished one I've used is the paid application Onkyo HF Player. However, the free application HibyMusic also works, but has few rough edges. The Onkyo application sounds good enough for me to make finding a better DAC no longer necessary.
One WARNING on both programs and the Essential DAC - when the DAC is recognized by the programs they frequently turn the initial volume level to 100%. If you do this while you've started music playing and have the headphones on you will be in for a very rude surprise. Trust me I learned this the hard way - plug everything in with no music playing and be sure to lower the volume first.
Update from comments - Apps that support the Essential DAC directly:
1. Onkyo HF Player
2. HibyMusic
3. USB Audio Player Pro
4. Neutron Music Player
I imagine that I'm in the minority of users who use neither streaming services or Bluetooth headphones. My music is usually high bit rate FLAC, ACC or MP3 depending on when I ripped it. My initial listening on the included 3.5mm DAC was not promising. A lack of dynamic range and low volume even on efficient in ear monitors (IEMs) made me think about finding a replacement.
The problem is there aren't at lot of options for small passive DACs. And my bet is that most of the current phones with no 3.5mm jack use the same chipset that Essential uses - the Conexant CX20985 for their headphone adapters. (For more info - see the AnandTech article - Conexant Introduces USB-C Digital Audio Compliant Chips.)
So that lead me to see if perhaps there was something that could be done in software. Based on my limited research it would appear that Android above version 5.0 has a built in USB to DAC driver. It also appears that this is what Essential uses to access the USB adapter. However, this driver is quite limited. Consistent with what I heard, the driver resamples everything to 16-bit 48kHz and limits the dynamic range. (For more info see extreamsd.com and their USB audio driver page.)
Good news! There are several music player applications on GooglePlay that are capable of natively recognizing the Essential DAC over USB. The difference in sound quality, volume and dynamic range is like night and day. The most polished one I've used is the paid application Onkyo HF Player. However, the free application HibyMusic also works, but has few rough edges. The Onkyo application sounds good enough for me to make finding a better DAC no longer necessary.
One WARNING on both programs and the Essential DAC - when the DAC is recognized by the programs they frequently turn the initial volume level to 100%. If you do this while you've started music playing and have the headphones on you will be in for a very rude surprise. Trust me I learned this the hard way - plug everything in with no music playing and be sure to lower the volume first.
Update from comments - Apps that support the Essential DAC directly:
1. Onkyo HF Player
2. HibyMusic
3. USB Audio Player Pro
4. Neutron Music Player
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