Completely off CS43131 topic

.......but I did not know where to post this, and I don't think the 'Walk Play' app deserves a brand new thread.
Besides this TT39510B01, aka JM20-Pro (CS43131-based), the TTGK website lists a few modules with EQ capabilities, which I assume (yes, a wild assumption !!!) could mean compatibility with the TTGK 'Walk Play' app.
Non-exhaustive list, limited to some of the TTGK "USB-C connector-type" modules explicitely mentioning EQ capabilities:
- TTTT39510B01: CB5100+CS43131, 8-band EQ. aka JCally JM20-Pro.
- DA8331ZY-TT: CX31993, 8-band EQ. Note that I yet to see a CX31993 dongle offering EQ.
- DAT4339HM-TT: CX31993, 9-band EQ. See the one above. So, is it 8 or 9 bands EQ?
- DA4283HM-TT: CX21988, 8-band EQ. That's also the chip used on the Moondrop FreeDSP cable with a 9-band PEQ. Side note: 'Walk Play' does not recognizes Monndrop FreeDSP; assumed to be different FW.
- DAT4001HM-L-TT: KT0210, 8-band EQ. Although there are several DSP-enabled using the KT0210 chip (Tanchjim DSP versions of Zero, One, Tanya; Moondrop CDSP, Chu-II DSP, etc.), they are all 5-band EQ, not 8-band. Side note: 'Walk Play' does not recognizes Monndrop Chu-II DSP. Haven't tried the Tanchjim's.
- DAH6312HM+P-TT: BES3001SP, 10-band EQ. This BES chip is used on the JCally TC08-Pro and TC20 USB-C upgrade cables for IEMs, which does mention EQ capabilities and differential output. Side note: the new FiiO BTR11 BT/USB dongle uses a BT2700 DAC/Amp chip (SE; same family/OEM?), but no mention of EQ capabilities on the BTR11.
- DAT4315HM_P-TT: BES3001SP+MAX97220, 9-band PEQ. Appears to be the "high-power" version of the previous one. So, is the BES3001SP enabling 9 or 10-band EQ?
- DAT4294HM-TT: AB229D, 10-band EQ. This chip definitely falls into the "obscure" category... It it is limited to 16bit/48kHz. TTGK also has an interesting DAT4295AUX-TT module, which appears very similar but adds an "auxiliary" USB-C input or bypass (Spdif?).
- DAT412BHM-TT: CB1200AU, 8-band EQ. Another "obscure" chip (related to the CB5100 bridge of the JCally JM20-Pro--the "CB" prefix?). Supports 32bit/384kHz.
- DAT4161HM-TT: TT1000B, 8-band PEQ. One more "obscure" chip... Never heard of these "TT" chips. Supports an unusual 16bit/96kHz bit depth/rate.
- DAH4401HM-TT, TT4280B, 8-band EQ. The final one in the list of "obscure" chips. Also supports this unusual 16bit/96kHz.
I already own the JCally JM20-Pro, #1 on the list, and confirmed it does work with 'Walk Play'. To learn a little more about these "obscure" chips, and for little money, I blindly ordered a few “random” dongles/cables on Amazon & AliExpress, with the same wild assumption that they could be based upon these 'Walk Play' compatible TTGK modules...
Amazon unbranded dongle - What may be #8 module in the above list ($8.99 on Amazon, pack of two):.
View attachment 413373
View attachment 413374
No mention of EQ, but the picture shows a 'AB229D' chip, which is listed as ‘Walk Play’ compatible by TTGK... And by the way, if it is indeed based on one of these TTGK modules, the rendering picture above is pure fantasy, as AB229D is a single, all-in-one, chip and it's certainly larger than what the pictures shows.
AliExpress unbranded dongle - What may be #9 module in the above list. $5.41 at AliExpress:
View attachment 413369
This is one is listed as ‘Walk Play’ compatible, and talks about "EQ tone tuning". I found nothing interesting about this ‘CB1200AU’ chip. TTGK spec for the #9 module are : THD+N -85dB @32Ω, SNR 100dB @32Ω, DNR 100dB @32Ω, drive voltage: 580mV.
JCally TC08-Pro & TC20 USB-C upgrade cable for IEMs - May be #6 module in the above list (TC08-Pro), or a version with a 90 deg connector of that same module (TC20). $10.90 & 16.90 at AliExpress:
View attachment 413385
JCally description talks about "JCally team modulated own brand EQ acoustic curve line base on BES3001-SP". A reference to 'Walk Play'? The description also hints at a balanced (differential) output.
As with the JM20-Pro, this is a shoot in the dark... I'll try to post a brief summary report of my findings and not derail this CS43131 thread further.