SD MP3 player for background music in store outlet

J

johanpeeter

Hi,

I'm looking for an MP3 player WITHOUT internal memory, I want it to
play from an SD card (eastly interchangable)

I also want to power it from an external powersupply (instead of
running it from it's batteries)

Also I want it to start playing IN RANDOM and REPEAT FOREVER mode when
power comes up

This way I would have a simple to use, endless music player for
playing muzak in a store outlet

I'm prepared to do some modifications on the device if needed ...

anyone know what I'm looking for ?
som kind of cheap Chinese stuff capable of doing this ?

Please let me know

Thanks

Johan
 
S

Sjouke Burry

Hi,

I'm looking for an MP3 player WITHOUT internal memory, I want it to
play from an SD card (eastly interchangable)

I also want to power it from an external powersupply (instead of
running it from it's batteries)

Also I want it to start playing IN RANDOM and REPEAT FOREVER mode when
power comes up

This way I would have a simple to use, endless music player for
playing muzak in a store outlet

I'm prepared to do some modifications on the device if needed ...

anyone know what I'm looking for ?
som kind of cheap Chinese stuff capable of doing this ?

Please let me know

Thanks

Johan
Quite a lot of DVD players can do what you want.
The one I have plays mp3 and cd besides dvd's.
You can put your mp3 songs on a data cd or dvd.
40 country songs, using 108 MB, give about an hour
of music in my case, and i can set the dvd player
to endless repeat.
Player: Philips DVP3040, 78 euro(~100 dollar??).
 
K

kony

Hi,

I'm looking for an MP3 player WITHOUT internal memory,

Only the cheap junk players have no memory.


I want it to
play from an SD card (eastly interchangable)

Ok then Google for SD MP3.


I also want to power it from an external powersupply (instead of
running it from it's batteries)

Some can if you tape over or disconnect the USB data pins
(preferribly in a low cost USB extension cable instead of
modifying the player itself), or use one of those AC-USB
wall wart type power adapters. Another alternative would be
to just solder leads to a typical DC barrel jack to the
battery terminals and pick up the PSU with the correct
voltage which would tend to depend on which battery type the
player used (alkaline & rechargable NiMH/NiCd compatible vs
internal lithium). Either is do-able, as would be making a
custom supply. I suspect a common 1 x AAA powered type
would run from 1.2V so you could just put an LM317 regulator
after a wall wart without even having the feedback circuit
since it's reference voltage is 1.2. Add a capacitor after
it just for the heck of it, and for reference a player tends
to use a few dozen mA so if your wall wart is significantly
higher voltage you might want a heatsink on the regulator.

Also I want it to start playing IN RANDOM and REPEAT FOREVER mode when
power comes up

Sorry, but I don't think any of them start out playing when
first turned on. Nor does a DVD player, CD player or most
anything else except a radio. I suppose you could just turn
it on and leave it on (since it's such a small consumer of
power) in that random-repeat mode, then to turn off the
music you only turn off the power amp following it.


This way I would have a simple to use, endless music player for
playing muzak in a store outlet


Seems a little hackish, can't they afford a real system?
What about licensing for the music?

I'm prepared to do some modifications on the device if needed ...

To what extent? We have no idea of your expertise. Given
someone who could reverse engineer the firmware on a player
it might be possible to make it play in the desired mode the
moment it was turned on, however I think you would want to
turn off the power amp when you don't want music playing
(like overnight?) and that is effectively the same result.
What remains is training someone present on how to get it
working again when there is a power outtage or other event
disrupting the operation, that they know to turn it back on
and how to make it play, in the desired mode.
anyone know what I'm looking for ?
som kind of cheap Chinese stuff capable of doing this ?

The more you relax your requirements, the more likely you
can get something to work.
 
K

kony

In message <[email protected]> kony


Which is truly sad.


Sad if they're so cheaply made that they couldn't even
budget $15 for a Gig of memory or sad to not find a good
player which only has removable memory?

I must not be the typical consumer as I'd just as soon have
it larger, using a AA battery and a compact flash card to
fit more chips in, but instead now some like Sandisk's that
used SD cards have moved to microSD, limiting the upper
capacity potential even more.
 
D

DevilsPGD

In message <[email protected]> kony
Sad if they're so cheaply made that they couldn't even
budget $15 for a Gig of memory or sad to not find a good
player which only has removable memory?

I must not be the typical consumer as I'd just as soon have
it larger, using a AA battery and a compact flash card to
fit more chips in, but instead now some like Sandisk's that
used SD cards have moved to microSD, limiting the upper
capacity potential even more.

I've owned a couple players in my life that had multiple storage
mechanisms, every one had an annoying and/or horrible interface, ranging
from jumping to the internal memory when the external memory was removed
or rebooted, to even defaulting back to the internal memory when the
playlist finished.

I just don't see the point of multiple storage mediums in the same
player. If I buy a player with an SD slot, I'll buy a large enough SD
card to go with it.
 
K

kony

In message <[email protected]> kony


I've owned a couple players in my life that had multiple storage
mechanisms, every one had an annoying and/or horrible interface, ranging
from jumping to the internal memory when the external memory was removed
or rebooted, to even defaulting back to the internal memory when the
playlist finished.

I just don't see the point of multiple storage mediums in the same
player. If I buy a player with an SD slot, I'll buy a large enough SD
card to go with it.


It seems "large enough" has everything to do with the
available capacity at the time, as today it's 8GB and if you
bought a player with 4GB internal, 50% improvement is not
too shabby.

I am wondering if your past player bugs were just due to the
infancy of the technology and it might be worked out by now.
Mine has SD slot and internal memory and in use it is
transparent to me, with the exception that when player is
connected to PC as UMS device it is two volumes
distinguishing the internal vs SD card. I'd certainly
rather have the SD slot and no memory than the memory w/o
the slot, but it does make for a larger player than it could
be when using flash instead of HDD.
 
P

ProfGene

Hi,

I'm looking for an MP3 player WITHOUT internal memory, I want it to
play from an SD card (eastly interchangable)

I also want to power it from an external powersupply (instead of
running it from it's batteries)

Also I want it to start playing IN RANDOM and REPEAT FOREVER mode when
power comes up

This way I would have a simple to use, endless music player for
playing muzak in a store outlet

I'm prepared to do some modifications on the device if needed ...

anyone know what I'm looking for ?
som kind of cheap Chinese stuff capable of doing this ?

Please let me know

Thanks

Johan
I have a Sony that runs on either batteries, or plugged into the wall or
even in a car. It plays CD's with mp3s or regular CD's and the mp3s
play for up to 12 hours. Whether it plays randomly I don't know because
I just play it on long car trips from start to finish or plugged into my
stereo in the house.
 
D

DevilsPGD

In message <[email protected]> kony
It seems "large enough" has everything to do with the
available capacity at the time, as today it's 8GB and if you
bought a player with 4GB internal, 50% improvement is not
too shabby.

And that's part of my point -- Down the road, when 4GB is considered
tiny, why would I want an additional 4GB added to my 32GB SD card?

I'd rather have the cost lower and invest that money on external memory
as desired, (which requires less engineering then adding two distinct
memory spaces, and all the other redundant circuitry, and power
consumption to power said circuitry)
 
K

kony

In message <[email protected]> kony


And that's part of my point -- Down the road, when 4GB is considered
tiny, why would I want an additional 4GB added to my 32GB SD card?

Why would you wait to have the capacity, not buying the card
now but instead buying it 'down the road' ?


I'd rather have the cost lower and invest that money on external memory
as desired, (which requires less engineering then adding two distinct
memory spaces, and all the other redundant circuitry, and power
consumption to power said circuitry)

"Less engineering" is pretty irrelevant as they already did
the engineering and aren't going to subtractively discount a
full featured player just to omit it (by more than the cost
of the memory). It is unfortunate but when buying such
integrated devices we can't often choose to have everything
but *one* feature and that just to suit an ideal of slight
cost decrease.

Two distinct memory spaces should be considered irrelevant
so long as there is no bug preventing that from working
seamlessly.

Redundant circuitry is fairly irrelevant as well, since a
scattering of 1 cent SMT parts adds little to size or cost
when talking about much larger features like screen,
controls, battery, and the memory card/slot.

It is true and a good point about power consumption, though
not always the case as having one internal and one external
should be no worse than two external chips. Over the long
term there is the possibility to offset it with higher
density chips, so long as it's not just stacked chip die,
but I would not think of a lowered cost MP3 player as a long
term investment and there isn't even an assurance you can
perpetually upgrade the card before reaching a capacity
limit (as is already the case with SDHC support, and was in
previously years with some having FAT16 filesystem. ). So
putting this into a context, if 2-3 years ago you had bought
a player supporting SD cards, you couldn't use today's 8GB
cards. Your total capacity is significantly higher if it
has more integral memory. We can hope a player bought today
has a longer forward compatibility with higher density
memory but we cannot control nor be certain of it.

Towards the goal of future support, certainly it's a better
time now than 2 years ago, but looking for all these
features it tends to be the case that not everyone wants
same features as you or I so the player has more features to
suit everyone instead of an attempt to make 6 different
players... except that in many cases they do vary the amount
of memory inside so you can at least choose the least memory
endowed if that's what you want.
 
D

DevilsPGD

In message <[email protected]> kony
Why would you wait to have the capacity, not buying the card
now but instead buying it 'down the road' ?

Because 32GB SD cards don't exist yet.

When I have multiple 32GB SD cards, and put the entire collection on
random, I'll end up with the few songs on the 4GB playlist always
playing, and the 32GB ones playing only when that card is in the player.

I just can't see the upside, other then some marginal bit of additional
flash at a cost higher then an equivalent SD card.

That being said, I'm more of a drive based player myself.
 
K

kony

In message <[email protected]> kony


Because 32GB SD cards don't exist yet.

When I have multiple 32GB SD cards, and put the entire collection on
random, I'll end up with the few songs on the 4GB playlist always
playing, and the 32GB ones playing only when that card is in the player.

I suppose, but do you really plan to carry around 64+GB
worth of flash cards with you? It seems like a bit much,
especially since a playlist that always included the 4GB
contents would merely mean they're played once every few
days... 32GB is quite a few songs.


I just can't see the upside, other then some marginal bit of additional
flash at a cost higher then an equivalent SD card.

That being said, I'm more of a drive based player myself.

As already stated, it's not "some marginal bit", it is a
significant fraction of total capacity you can expect to use
if only you choose to buy a player that isn't minimally
endowed. Also as stated, if you buy a player now you can't
necessarily assume it will support a 32GB flash card nor
even that it won't have broken by that point in time.

The possibility of it breaking IS a factor making it
desirable to have less or no integrated memory since it is
just a further loss when it's less likely the SD card would
simultaneously be damaged by the event that broke the
player, but on the other hand it wouldn't cover theft or
loss.
 
D

DevilsPGD

In message <[email protected]> kony
I suppose, but do you really plan to carry around 64+GB
worth of flash cards with you? It seems like a bit much,
especially since a playlist that always included the 4GB
contents would merely mean they're played once every few
days... 32GB is quite a few songs.

I remember thinking the same thing about 2GB cards when they appeared on
the horizon when my digital camera and flash media player were both on
32MB smartmedia cards (with an upper maximum of 128MB and 64MB
respectively for those two devices)

Yes, I do plan to carry around 64GB+ worth of flash cards as soon as
they're under $100 per card. In fact, I probably plan to carry around
the largest card with decent performance I can find under $100 for the
remainder of my life or the life of flash in this implementation.

I am fairly insistent that all my devices use the same flash format
(Kiss my ass Sony. Join the rest of the world, or you're still not on
my buying list), being able to toss the same card in my camera, laptop,
PDA, and micro-card-reader has become invaluable, dropping the extra
cable to connect up my MP3 player without a huge drop in capacity would
be nice too.
 

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