Whers the DBX Boom Box !!  For the good Bass !!

DeeringAmps

Bub


I just fired up Sound Forge 9.0 and did some testing. I got some interesting results.

1. Created a 1kHz tone and set my monitors to a comfortable volume.
2. I started at 0Hz and worked my way up to 20kHz by increments of 5Hz or more.
3. Audio system: 2-Yamaha HS-80m's connected to an M-Audio Fast Track Ultra.

FTU set @ 96kHz

0 ~ 20Hz: Woofers vibrated but I could hear or feel nothing.
25Hz ~ 85Hz: I could feel the bass but couldn't distinguish tones.
90Hz ~ 18.5kHz: I could distinguish tones but had to raise the volume when I got in the upper kHz range. After 18.5kHz I could hear nothing.

Fast Track Ultra set at 44.1kHz

0 ~ 30Hz: Woofers vibrated but I could hear or feel nothing.
35 ~ 55Hz: I could feel the bass but couldn't distinguish tones.
60 ~ 15.6kHz: I could distinguish tones but had to raise the volume when I got in the upper kHz range. After 15.6kHz I could hear nothing.

Interesting results.

Interesting that no one wishes to discuss actual results.

I was thinking the same thing. :(

Guess I would prefer the 44.1 results for the Ultra Fast at least.

What I thought was odd was the fact that I should have been able to hear above 15.6kHz with the FTU set at 44.1kHz. According to theory the range should have gone up to 22kHz. I know I can hear up to 18.5kHz because I heard it with the FTU set to 96kHz. It was surprising how undefined the low end was when set to 96kHz also. It was definitely better at 44.1kHz.

In theory none of this should have happened so it must be the way the FTU is converting everything.

It was a fun little test, I think everyone should try it. It tells you a lot about your hearing and your system's ability to reproduce sounds. I discovered that my Tinnitus is around 15kHz.

Now I'm torn. I get 10.2ms latency @ 44.1kHz and 4.9ms latency @ 96kHz but I prefer how 44.1kHz sounds.

Bub,

My questions got bumped to the previous page.  I'm just trying to understand exactly what you tested.  Here are the questions again...


Can you elaborate on the two steps you mentioned?

1. Created a 1kHz tone and set my monitors to a comfortable volume.
> Was this a sine wave, square wave, ...?

2. I started at 0Hz and worked my way up to 20kHz by increments of 5Hz or more.
> What were you varying from 0Hz to 20kHz?

Thanks,
Don

John


For one my hearing is not that acute beyond 15kHz. So how would I comment?

Also by adjusting the volume it make the test less then useful.

What you could have commented on was the fact that I proved you right in that the sampling rate has no real benefit over 44.1kHz, at least on the Fast Track Ultra, other than lower latency. If anything I got a better sound on this particular unit at 44.1kHz because the bass was notably clearer. <-Edited this line for clarity.

The test isn't supposed to be a scientifically based end all be all. It's just a simple test to produce Sine Wave's at different sampling rates to see what you can hear at what sampling rate on your particular piece of equipment.

It was fun and I actually learned some stuff.

John


Bub I can't figure out what to make of your test.

Well, what I got out of it was, the bass sounded better at a lower sampling rate (44.1) and I heard no usable benefit in the upper frequency range when I set it to a higher sampling rate (96).

One thing I forgot to mention ...

I manually set my FTU to 96 and 44.1 and when I created a new file in Sound Forge, I created it to match the sampling rate that the FTU was set to. That's actually a key part that I forgot to mention.

n0rd


<In voice of Morbo from Futurama>
McGurk Effect is proof that you pitiful humans can not be trusted in what you perceive!!

Hahahahaha!!
</In voice of Morbo from Futurama>

That particular example is bogus. It is impossible to pronounce a B sound with your teeth on your lip the way he was doing. It's more likely it was a test to make people think they heard the same thing even though it was different.

Bub

n0rd


<In voice of Morbo from Futurama>
McGurk Effect is proof that you pitiful humans can not be trusted in what you perceive!!

Hahahahaha!!
</In voice of Morbo from Futurama>

That particular example is bogus. It is impossible to pronounce a B sound with your teeth on your lip the way he was doing. It's more likely it was a test to make people think they heard the same thing even though it was different.

Bub - I think you missed what they were doing.  they didn't say that he was actually saying "BAH" with the teeth and lip positioned for the "FAH" sound.   what he's saying in the "FAH" position is irrelevant except for the VISUAL portion of it.  the visual "FAH" against the audible "BAH" makes us "hear" "FAH".