• Registered: 2024-01-17
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Topic: BT input ?

Sorry for my bad english :-/

I have a ADI-2 DAC FS and very pleased with it, of course.
Hifi use but with a BT module for practical reasons:
https://www.tinysineaudio.com/products/ … tput-apt-x
Unfortunately the analog input of the BT module quickly goes into saturation (and TinySine support did not answer).

The question is: is BT input regarded as a "toy" and not enough "serious" to be integrated in future RME products, or ?
With APT-X codec, I have to say that I have no complaints regarding soud quality (Klipsch Cornwall III speakers)

I would like the ADI-2/4 Pro SE for RIAA capability but it seems to be discontinued unfortunately.

  • vinark
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Re: BT input ?

This is an issue with the analog input beding to sensitive for what you are connecting to it. You must bring the output level of the connected device down

Vincent, Amsterdam
https://soundcloud.com/thesecretworld
BFpro fs, 2X HDSP9652 ADI-8AE, 2X HDSP9632

3 Reply by Kubrak (edited by Kubrak 2026-02-04 16:13:31)

  • Kubrak
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Re: BT input ?

darksideofthemoog wrote:

Unfortunately the analog input of the BT module quickly goes into saturation (and TinySine support did not answer).

As Vinark has already said, you must lower signal level on source side, it seems to be too strong. But, what is the purpose of using good DA like ADI-2 DAC and feed it by a signal that has been converted by a very cheap AD?

Concerning ADI-2/4 Pro... One may buy it secondhand, or, hopefully, new RME model will be released, sooner or later.

FF UCX II, Digiface USB, Babyface Pro FS
  • Registered: 2024-01-17
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Re: BT input ?

Thanks,

But, what is the purpose of using good DA like ADI-2 DAC and feed it by a signal that has been converted by a very cheap AD?

Because sometimes I need an analog input, for the turntable.
Initially I looked for a good ADC (RCA to TOSLINK) but I don't know if a good quality product exists.
Fortunately there is a volume control on the phono preamp, but I need to dial up the ADI DAC volume quite a bit to compensate.
That's not so important anyway because most of the time I don't need it.

A BT input would be nice in the future, even if its not professional grade..

5 Reply by waedi (edited by waedi 2026-02-05 00:11:46)

  • waedi
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Re: BT input ?

APT-X is good sound quality for me too, Radio News from iPhone to headphone, no problem,
but for DAW work it has too big latency.
The bluetooth driver for APT-X has bigger latency than the old bluetooth audio codec in the beginning.
Makes no sense to include this into pro audio gear.

M1-Tahoe, Madiface Pro, Digiface USB, Babyface silver and blue

6 Reply by ramses (edited by ramses 2026-02-05 06:23:09)

  • ramses
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Re: BT input ?

Information from internet tell, that none of the aptX variants provides guaranteed lossless transmission, and you have latency.

This also applies to “aptX Lossless,” as it depends on Bluetooth signal quality, which cannot be enforced or monitored and therefore cannot guarantee the required sustained bandwidth.

Interference sources such as active WLAN, wireless mice or keyboards, nearby smartphones, interference from USB3 connections, reflections, or movement between transmitter and receiver can already trigger a fallback to lossy aptX Adaptive.

In addition, the lossless mode is limited to 16-bit / 44.1 kHz.

It sounds as if this has nothing to do with "pro audio" or "High Res" audio and is not predictable/reliable in any way.

BR Ramses - HDSPe MADI FX, M-1620 Pro D, 12Mic, UFX III, ADI-2 Pro FS R BE, Nuendo 14, Win10 IoT Ent

7 Reply by KaiS (edited by KaiS 2026-02-05 09:24:40)

  • KaiS
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Re: BT input ?

darksideofthemoog wrote:

Because sometimes I need an analog input, for the turntable.
Initially I looked for a good ADC (RCA to TOSLINK) but I don't know if a good quality product exists.
Fortunately there is a volume control on the phono preamp, ...

Long term you‘re better off with an ADI-2/4 Pro SE for your turntable.
It’s an eye-opener for vinyl sound quality.
It can even replace your existing phono-pre, and of course the BT module.

The only thing to take into consideration: it needs to be placed close to the turntable, as the phono cable can’t be extended, at least not with an MM-pickups.

KaiS's Website

  • ramses
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Re: BT input ?

Kai, do you now MC systems with enough output, or is a preamp mandatory if you do not have MM?

BR Ramses - HDSPe MADI FX, M-1620 Pro D, 12Mic, UFX III, ADI-2 Pro FS R BE, Nuendo 14, Win10 IoT Ent

9 Reply by KaiS (edited by KaiS 2026-02-05 12:03:58)

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Re: BT input ?

ramses wrote:

Kai, do you now MC systems with enough output, or is a preamp mandatory if you do not have MM?

Every MC-pickup can be connected to ADI-2 Pro SE through a Step-Up-Transformer.
High-output MC’s even have enough voltage output for direct connection.
But - I wouldn’t select a pickup based on this fact.

I’m using the Ortofon T-30 (original version) SUT, with a Dynavector Karat 17DII.
The Ortofon T-30 is rightfully highly reputed, and one of the most versatile SUTs available (used, ca. 400 bucks).
It has a 5-step impedance matching switch, which makes it fit to every MC pickup on the market.

KaiS's Website

  • Registered: 2024-01-17
  • Posts: 6

Re: BT input ?

Thanks all for your inputs, I was expecting that regarding BT, not the right place for pro audio gear even if it works well for "consumer use (just listening)".

Regarding stepup transformer for MC, Lundhal 1681 is a nice one:
http://www.lundahl.se/wp-content/upload … s/1681.pdf

I need to find an ADI-2/4 Pro SE, stupid prices on ebay.. seems to be hard to find.

  • ramses
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Re: BT input ?

Thanks to u both.

BR Ramses - HDSPe MADI FX, M-1620 Pro D, 12Mic, UFX III, ADI-2 Pro FS R BE, Nuendo 14, Win10 IoT Ent
  • vinark
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Re: BT input ?

I think your bt reciever with spdif is a great tip for anyone needing bt on their adi"'s, so thank you too!

Vincent, Amsterdam
https://soundcloud.com/thesecretworld
BFpro fs, 2X HDSP9652 ADI-8AE, 2X HDSP9632
  • Registered: 2024-01-17
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Re: BT input ?

And for the lucky ADI-2/4 Pro SE owners, there is this one:

https://www.tinysineaudio.com/products/ … eq=uniform

It works well without stupid loud sounds when pairing.

Hope RME will keep the vinyl preamp on the next model..

I did not see any ADI-2/4 Pro SE on sale, except on a few scams websites.