Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1
  • 2

TOPIC: Is there a leakage?

Is there a leakage? 2 years 4 weeks ago #2

  • S. Christian Collins
  • S. Christian Collins's Avatar
  • Offline
  • Senior Member
  • Posts: 66
  • Thank you received: 24
Due to a quirk in the SoundFont specification (or at least how it was implemented by E-MU/Creative), 1 dB in the attenuation field only attenuates the sound by 0.4 dB. So, your 144 dB attenuation is only attenuating by 57.6 dB, which is why you still hear sound.
The administrator has disabled public write access.

Is there a leakage? 2 years 4 weeks ago #3

  • S. Christian Collins
  • S. Christian Collins's Avatar
  • Offline
  • Senior Member
  • Posts: 66
  • Thank you received: 24
Also, if you're looking to not hear certain zones while editing, you can right-click the zone title in the table view and choose "mute", "activate solo", or "unmute all".

... hmmm, I just noticed that "unmute all" is broken. I will file a bug report about that.
The administrator has disabled public write access.

Is there a leakage? 2 years 4 weeks ago #4

  • ziyametedemircan
  • ziyametedemircan's Avatar
  • Offline
  • Premium Member
  • Posts: 119
  • Thank you received: 33
Inst 144 = 57.6
Perf 144 = 57.6
57.6 + 57.6 = 115.2 Is this still normal?
Can anyone hear -115.2dB ?
The administrator has disabled public write access.

Is there a leakage? 2 years 4 weeks ago #5

  • S. Christian Collins
  • S. Christian Collins's Avatar
  • Offline
  • Senior Member
  • Posts: 66
  • Thank you received: 24
I did not notice you had 144 dB set at both instrument and preset level. This should be inaudible, and when loaded into FluidSynth, it is.
The administrator has disabled public write access.

Is there a leakage? 2 years 1 week ago #6

  • Davy
  • Davy's Avatar
  • Offline
  • Administrator
  • Organ enthusiast and creator of Polyphone
  • Posts: 346
  • Thank you received: 86
Each parameter has a range. In the case of the attenuation this is between 0 and 144 and there is no way to go outside this (written in the specs). So even if you specify 144 at the instrument level and 144 at the preset level, since 288 it is above 144 it will be back to 144.

As you noticed, the dB are not real dB but for compatibility with all other soundfonts Polyphone also includes this error.
The administrator has disabled public write access.

Is there a leakage? 2 years 1 week ago #7

  • ziyametedemircan
  • ziyametedemircan's Avatar
  • Offline
  • Premium Member
  • Posts: 119
  • Thank you received: 33
You are right.
But I rely on this:

"The volume envelope operates in dB, with the attack peak providing a full scale output, appropriately scaled by the initial volume. The zero value, however, is actually zero gain. The implementation in the EMU8000 provides for 96 dB of amplitude control. When 96 dB of attenuation is reached in the final gain amplifier, an abrupt jump to zero gain (infinite dB of attenuation) occurs. In a 16-bit system, this jump is inaudible."

We never get a zero gain here.

Please let me know if I missed a point.
Last Edit: 2 years 1 week ago by ziyametedemircan. Reason: formatting
The administrator has disabled public write access.
  • Page:
  • 1
  • 2
Time to create page: 0.059 seconds