BDP-1 CPU and AIFF, ALAC and MP3

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R. Daneel

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Re: BDP-1 CPU and AIFF, ALAC and MP3
« Reply #20 on: 20 May 2015, 03:15 pm »
Hi Guys,

A number of customers have called in about concerns in the past and quite recently.  The BDP in its default configuration, while not performing any additional tasks (updating database, building an album art database, etc) is capable of playing back flac and wav up to 352khz USB and 192khz over spdif.  This has been tested using a USB thumb drive formatted as fat32, wd mybook live and a wd mycloud as the source.

Fat32 will have the least amount of overhead in comparison to NTFS or hfs+.  Using a samba share (NAS), will have even less impact on the CPU.

I will say any additional reads/write operation during playback will cause interruptions.  While playing back the 192khz file of a song I was also upsampling the same song using Audacity on my computer to 352khz and noticed interruption in playback. 

I will also say some songs, one in perticular we use to include on the USB thumb drive sounds like it's not playing back correctly; but in fact it is.  Just the way the song was recorded, but this should be repeatable each time the song is played.

Hope the above helps

Hi Chris!

Thanks for your reply!

The scenarios you describe make sense but I have to tell you, none of them apply to what I am experiencing with my BDP-1.

My player is essentially used as a CD player, with the onboard controls and display. So I really don't do anything else while it is playing music. The interruptions happen randomly, never in the same moment of a particular song and only with 192kHz. Otherwise, BDP-1 manages to play even the worst of mp3 files flawlessly but with 192kHz, it almost seems "preoccupied" and "runs out of memory".

All of my thumb drives are formatted to FAT32.

Interestingly, the BDP sampler thumbdrive that came with the player contains a 192kHz song but it plays fine.

It is annoying. I will sometimes do analogue recordings for friends and the interruptions are recorded on the tape.

Antun

unincognito

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Re: BDP-1 CPU and AIFF, ALAC and MP3
« Reply #21 on: 21 May 2015, 12:57 am »
Keep in mind exfat isn't fat32; a number of peoe have made this mistake.  Most recently a customer went in to a computer shop asking for a drive to be formatted fat32 and they still formatted it as exfat.

The BDP can still be looking for changes, even if it is only controlled from the front panel controls.

Finally some new info

Today I was remotely looking at a BDP-1 that for some reason the samba service was chewing up quite a bit of CPU usage.  Specifically the samba service meant for sharing files on drives attached to the BDP.  So you may want to turn off the samba service under services to see if that help eliviate any issues.

Keep in mind though, if the Bryston sampler drive is working fine then chances are it's your storage or files.  If it's consistently repeatable at the same part of the file, then I'd say the problmlies with the file.

Cheers
Chris

R. Daneel

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Re: BDP-1 CPU and AIFF, ALAC and MP3
« Reply #22 on: 21 May 2015, 11:04 am »
Hi Chris!

The interruptions never happen in the same place so it cannot be the files.

I will do as you say and turn off Samba in the services location. I am not sure what Samba is though, the first time I've heard of it was on this thread.

In theory, would disconnecting the BDP-1 from the network help or would the machine still be "looking" for a network and trying to access album art and other things that are downloaded from the internet?