Recent content by FSAF

All of my listening drivers are heavily modified. They are better than anything produced commercially, including Purifi, SB, KEF, etc. I do not want to embarrass commercial vendors, for their response will be devastatingly evil. My father was sent to GULAG because he was too clever, and I do not...

I belong to the negligible minority who listen to piano, chamber, and Baroque music. IMHO, any well-recorded piano piece is a perfect speaker test. I use the modified SR16PFC for testing only, not for listening. For listening, I run floor-to-ceiling 4-way line arrays - which are completely...

FSAF is just another instrument, in addition to REW's traditional ESS. How you use it - it's all up to you. You are free to choose what excitation you are using, and I am ambivalent about what test signals you prefer. Some signals can work better for you, some - for others. You may put more...

"There is nothing more practical than a good theory" - my university professors said :cool: - which I disagree with. There is a huge distance between knowing theory (and even teaching it) and understanding it, and I don't know how to cover it. When my aunts were 10-12 years old, they used to...

Correct, you can not point B-5 to the ceiling and expect a true, nearly flat omni pattern over the entire frequency range. Here is an example of aligning woofer and tweeter IRs in MATLAB (it looks too simple, I know). I am not sure how to do the same in REW. ...which is understandable in the...

I recall my conversations with Bayerdymanic's CTO and his strong preference for good electret mics. MM1 is "Condenser (back electret)" by spec. You can calibrate a mic yourself; it's a text file, after all. That's right, I use MATLAB, which is the original environment where FSAF was developed...

Please have in mind that electret microphones often claim max SPL as THD=10% (not THD=1%, as for condenser). Check the spk out and mic in .wavs to make sure nothing overflows. I would also recommend the Behringer B-5 as a cheap, low-noise, high-dynamic-range microphone instead of an electret...

No, 96Hz tone burst is not feasible to adapt on. The excitation signal shall cover the entire spectrum. You can put a piece of music, say 10sec, in the beginning and then the tone burst at roughly the same loudness as music. Very good choice of monitors! Let's assume that a typical...

Please let me know if I am mistaken about your setup: 1. You have an Apollo Solo audio interface, 2. which operates in USB asynchronous mode, i.e., uses its own clock as the master clock for both in and out 3. You have several speakers, one of them "ESI uniK 05+" 4. You have several measurement...

1. The .wav REW sends to the speaker can be amplified by 8dB, and some high-freq noise can be added. 2. I do not know how to get mic file. Other people on the forum surely know that. 3. The FSAF residual you attached sounds like FSAF did not do much. 4. The drum sounds are about 1 sec long. If...

The +2dB and 2cm look ... interesting. I suspect that the setup goes to saturation somewhere. To diagnose the problem, I need to see the .wav that has been sent to the speaker and the .wav recorded from the microphone. The drumtest.wav by itself is ok. On my setup, FSAF converges fine. Yet, I...

1. It is a complete mystery for me, too. 2. Some do sometimes. SB12PAC ($23) is identical SB12CAC ($80) except for the cone material and the large aluminium ring inside SB12CAC. Move that ring into SB12PAC (it fits perfectly), and the lower distortions move with it. 3. Wrong beliefs that became...

1. Adding a linear damper to the spider. Practically all spiders resonate on 150...500Hz frequencies, the internal damping is non-linear - looks like dry friction. If you add flexible glue and foam, the resonance will disappear. 2. Adding a linear damper to the cone. Cones often exhibit...

I made a few arrays, 4 way, specifically for my room to deal with floor/ceiling reflections. I implemented crossover in a PC, via Equalizer APO, with TPA3255 per way. IMHO, you need to know the math of near-field beamforming to make something worthy of the effort, which is not exactly trivial.

What level of explanation do you need? PhD or 5 years old? The "original" does not refer to master tapes or acoustic fields in the recording studio. It refers to the digital recordings available to the end-user. It is not a problem to equalize your acoustic system to a picture-perfect...