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New chromecast api support on Linn DS/M
2015-09-30, 12:57
Post: #1
New chromecast api support on Linn DS/M
With the new chromecast 2 and the chromecast audio device lauch of yesterday, I think it is a great idea if DS/DSM would support it.

I love using airplay on my ADSM/1 with spotify / youtube / (insert your favorite media app for iOS here), and would love to be able to do the same from the android devices we have at home.

Is this in the works?
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2015-09-30, 13:07
Post: #2
RE: New chromecast api support on Linn DS/M
(2015-09-30 12:57)popko Wrote:  With the new chromecast 2 and the chromecast audio device lauch of yesterday, I think it is a great idea if DS/DSM would support it.

I love using airplay on my ADSM/1 with spotify / youtube / (insert your favorite media app for iOS here), and would love to be able to do the same from the android devices we have at home.

Is this in the works?

Not currently.....

To use android devices with DSM you can always get a bluetooth adapter (with digital out) and feed it into the DSM.
Alternatively, AirPlay functionality is available for Android as long as you root your device - I use an app called AirStream for this (please note - you root your device at your own risk....)
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2015-09-30, 13:21
Post: #3
RE: New chromecast api support on Linn DS/M
Having just read the BBC article about Chromecast Audio, I noticed this little bit of information about the latest Sonos speakers: -

"The company's latest trick is Trueplay - an audio-check tool in its app that plays a range of tones from the speaker and analyses them to compensate for audio distortions caused by nearby windows, curtains and walls.

The theory is that the speakers deliver the same quality of playback wherever they are placed"


Now where have I heard something like that before ...?

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2015-09-30, 13:32
Post: #4
RE: New chromecast api support on Linn DS/M
Not Linn that is for sure. Linn are dead set against microphone measurement. The Sonos system is a variant of that used in AV Receivers for many years.

CJ

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2015-09-30, 13:36
Post: #5
RE: New chromecast api support on Linn DS/M
(2015-09-30 13:32)CJ1045 Wrote:  Not Linn that is for sure. Linn are dead set against microphone measurement. The Sonos system is a variant of that used in AV Receivers for many years.

CJ

Yeah Briain was explaining that the limitations of microphones make this a bad option. I of course, know nothing....... Smile
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2015-09-30, 13:47 (This post was last modified: 2015-09-30 13:48 by Donald.)
Post: #6
RE: New chromecast api support on Linn DS/M
Shame there isn't a tongue-in-cheek Smiley face...!!!

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2015-09-30, 21:09
Post: #7
RE: New chromecast api support on Linn DS/M
(2015-09-30 13:32)CJ1045 Wrote:  Not Linn that is for sure. Linn are dead set against microphone measurement. The Sonos system is a variant of that used in AV Receivers for many years.

CJ

And this is probably worse given that there might not be a lot of consistency between iOS devices. At least AVR mics are all about the same, or in some cases calibrated with calibration file! In this instance it might be better if its not that clever and only does a bit of frequency EQ in the bass region

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2017-10-10, 01:43
Post: #8
RE: New chromecast api support on Linn DS/M
(2015-09-30 13:07)rockfather Wrote:  
(2015-09-30 12:57)popko Wrote:  With the new chromecast 2 and the chromecast audio device lauch of yesterday, I think it is a great idea if DS/DSM would support it.

I love using airplay on my ADSM/1 with spotify / youtube / (insert your favorite media app for iOS here), and would love to be able to do the same from the android devices we have at home.

Is this in the works?

Not currently.....

To use android devices with DSM you can always get a bluetooth adapter (with digital out) and feed it into the DSM.
Alternatively, AirPlay functionality is available for Android as long as you root your device - I use an app called AirStream for this (please note - you root your device at your own risk....)

Hi rockfather, so once rooted you can open a youtube music file using the youtube app and stream using airplay to a DS using the AirPlay feature?

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2017-10-10, 09:54
Post: #9
RE: New chromecast api support on Linn DS/M
(2017-10-10 01:43)dastrix Wrote:  Hi rockfather, so once rooted you can open a youtube music file using the youtube app and stream using airplay to a DS using the AirPlay feature?

That is correct - I wouldn't bet on lipsync being great though....
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2017-10-10, 15:23 (This post was last modified: 2017-10-10 16:34 by Briain.)
Post: #10
RE: New chromecast api support on Linn DS/M
(2015-09-30 13:36)Martin H Wrote:  
(2015-09-30 13:32)CJ1045 Wrote:  Not Linn that is for sure. Linn are dead set against microphone measurement. The Sonos system is a variant of that used in AV Receivers for many years.

CJ

Yeah Briain was explaining that the limitations of microphones make this a bad option. I of course, know nothing....... Smile

I don't wish to hijack this thread, but since it has been mentioned (and since I have also been mentioned) then I very strongly agree with Linn's stance on microphones. Not only do microphone measurement results change with small microphone position changes (and are influenced by reflections; particularly so as the frequency goes up), but whilst what Linn have done with SO (in particular with the stereo modes, and very much so with any above about 50 Hz) is visible on something like an REW waterfall plot, some are very subtle and it would take lots of extensive experience to interpret and tweak them using a human brain (in fact, it'd probably have to be the one residing inside the head of a certain Mr P Budd) and thus a pair of ears are still by far the easiest and fastest way to tweak the results calculated theoretically via Konfig.

That said, I have used a microphone to determine the optimal frequencies to park the dips on for my lower frequency modes (in particular, my L2 mode at 38 Hz). In my case, the patio doors at either end of the room comprise about 50% of the wall area, and the length of the room is thus difficult to estimate (the difference between glass-glass or wall-wall is 36 cm) so I used a microphone to measure the peak of the mode. Another way of looking at it is that I used a microphone to acoustically determine the room length (then I relied on the Konfig calculated Q - the width, in octaves - to model the 'shape' of the required dip, then I set it's depth purely by ear).

That is very different to placing a microphone atop your listening chair's headrest and letting an AV system sweep and generate all the parameters from measured results (and from what I have seen, it looks lime most of these systems are more about evening out the overall frequency response than dealing with the decay times of nasty room nodes). Whilst that is far better than nothing for (and yes, I have used that feature when setting up a home cinema system) it is nothing near to approaching what can be achieved via Konfig and ears on a 'proper' music system. The only way I can imagine that working would be a hybrid system where Konfig generates the basic results and some sort of fancy (and I mean very fancy) software package that uses the measured results to mildly tweak what Konfig has already calculated (perhaps based on brief pulses of tones at the calculated mode frequencies) but just looking at the results of my own REW sweeps in this room (using a miniDSP calibrated microphone and REW) it would actually be a very tricky thing for it to interpret (you'd really need a keen eye and a trained brain stuck on the end of these results, not a basic algorithm within an AV amp) and whilst something like REW might be of use for 'sanity checking' the more obvious fundamental modes, I would not even attempt to tweak the higher frequency modes based only on sweeps and interpretations of waterfall plots generated from the measured results; that is best done with a pair of musically attuned lugs and a bottle of strong wine!

It is also worth noting that whilst changes of 0.5 dB to the depth of a dip can make a very significant difference to the audible sound quality (0.5 dB change to my -15.5 dB L1 at 19 Hz even significantly impacts male voice reproduction when using the system for TV sound, for example) such a tiny change does not really make any obviously perceivable difference to a REW waterfall plot, so even if a microphone based scheme could be made to work, you'd still have to spend some time tweaking the dip depths by ear.

Bri Smile

NB The REW waterfall feature doesn't half generate some very pretty pictures, though; almost tempted to get my 15-45 Hz SO on vs SO off one blown up and made into a framed picture to hang on the lounge wall! Wink

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