mp3 equalizer

Started by Sherwin Huang February 18, 2004
Hello
I am a new engineer in the DSP field.
I have to implement an equalizer for our mp3 decoder.
The equalizer must include 4 modes, which is pop, rock, classic and
jazz.
The equalizer and mp3 decoder are implemented using ADI-2181 DSP.
Would you please tell me where to find the information about the 4
kinds of equalizer?

Thanks in advance.
Sherwin

Sherwin Huang wrote:
> Hello > I am a new engineer in the DSP field. > I have to implement an equalizer for our mp3 decoder. > The equalizer must include 4 modes, which is pop, rock, classic and > jazz. > The equalizer and mp3 decoder are implemented using ADI-2181 DSP. > Would you please tell me where to find the information about the 4 > kinds of equalizer?
Sorry, but I couldn't resist ;-) Pop: Rock: Classic: Jazz []----------- -----------[] -----[]------ -[]---------- []----------- -----------[] -----[]------ ----[]------- []----------- -----------[] -----[]------ --------[]--- []----------- -----------[] -----[]------ ---------[]-- []----------- -----------[] -----[]------ -------[]---- []----------- -----------[] -----[]------ -----[]------ []----------- -----------[] -----[]------ ---------[]-- []----------- -----------[] -----[]------ -------[]---- -- Jim Thomas Principal Applications Engineer Bittware, Inc jthomas@bittware.com http://www.bittware.com (703) 779-7770 When you have a new hammer, the whole world looks like a nail.
On Wed, 18 Feb 2004 10:35:01 -0500, Jim Thomas <jthomas@bittware.com>
wrote:

>Sherwin Huang wrote: >> Hello >> I am a new engineer in the DSP field. >> I have to implement an equalizer for our mp3 decoder. >> The equalizer must include 4 modes, which is pop, rock, classic and >> jazz. >> The equalizer and mp3 decoder are implemented using ADI-2181 DSP. >> Would you please tell me where to find the information about the 4 >> kinds of equalizer? > >Sorry, but I couldn't resist ;-) > > Pop: Rock: Classic: Jazz >[]----------- -----------[] -----[]------ -[]---------- >[]----------- -----------[] -----[]------ ----[]------- >[]----------- -----------[] -----[]------ --------[]--- >[]----------- -----------[] -----[]------ ---------[]-- >[]----------- -----------[] -----[]------ -------[]---- >[]----------- -----------[] -----[]------ -----[]------ >[]----------- -----------[] -----[]------ ---------[]-- >[]----------- -----------[] -----[]------ -------[]----
Thank you for your response!! ;-)
Sherwin Huang wrote:

> On Wed, 18 Feb 2004 10:35:01 -0500, Jim Thomas <jthomas@bittware.com> > wrote: > > >>Sherwin Huang wrote: >> >>>Hello >>>I am a new engineer in the DSP field. >>>I have to implement an equalizer for our mp3 decoder. >>>The equalizer must include 4 modes, which is pop, rock, classic and >>>jazz. >>>The equalizer and mp3 decoder are implemented using ADI-2181 DSP. >>>Would you please tell me where to find the information about the 4 >>>kinds of equalizer? >> >>Sorry, but I couldn't resist ;-) >> >> Pop: Rock: Classic: Jazz >>[]----------- -----------[] -----[]------ -[]---------- >>[]----------- -----------[] -----[]------ ----[]------- >>[]----------- -----------[] -----[]------ --------[]--- >>[]----------- -----------[] -----[]------ ---------[]-- >>[]----------- -----------[] -----[]------ -------[]---- >>[]----------- -----------[] -----[]------ -----[]------ >>[]----------- -----------[] -----[]------ ---------[]-- >>[]----------- -----------[] -----[]------ -------[]---- > > > > Thank you for your response!! ;-)
The display in my Subaru radio shows an interesting pattern. You might look at a low-end car radio, the kind with a few choices rather than am equalizer. (My radio also has bass and treble controls when I activate them.) The only difference I see in Jim's first three settings is volume. I take it you sat the joke. Jerry -- Engineering is the art of making what you want from things you can get. &#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;
On Wed, 18 Feb 2004, Jim Thomas wrote:

> Pop: Rock: Classic: Jazz > []----------- -----------[] -----[]------ -[]---------- > []----------- -----------[] -----[]------ ----[]------- > []----------- -----------[] -----[]------ --------[]--- > []----------- -----------[] -----[]------ ---------[]-- > []----------- -----------[] -----[]------ -------[]---- > []----------- -----------[] -----[]------ -----[]------ > []----------- -----------[] -----[]------ ---------[]-- > []----------- -----------[] -----[]------ -------[]----
Doesn't the Rock-setting usually look like this ? --------[]-- ------[]---- ----[]------ --[]-------- --[]-------- ----[]------ ------[]---- --------[]-- ;-) Honestly: I own a portable mp3-player with selectable EQ presets (like the ones that have been mentioned by Jim - they all sound bad except the setting "Standard" - which I guess turns the "EQ" off) IMO the only reason why manufactures include this crap is to extends the feature list. @Jim: Sorry, I had nothing much contributing stuff to say - I just wanted to let you know that these EQ-presets are of no great use. Ghis! Sebastian -- PGP-Key-ID (long): 572B1778A4CA0707
In article <6gl6309onf0j0rkh2itkrif5jkp4s6gguf@4ax.com>,
Sherwin Huang  <sherwin.eic89g@nctu.edu.tw> wrote:
>I have to implement an equalizer for our mp3 decoder. >The equalizer must include 4 modes, which is pop, rock, classic and >jazz. >The equalizer and mp3 decoder are implemented using ADI-2181 DSP. >Would you please tell me where to find the information about the 4 >kinds of equalizer?
Apple iTunes has eq presets with similar names, and it also shows how each setting looks on a 10-band graphic equalizer console. Motorola has a application note on one method of implementing a basic 10-band eq using the 56000 on their dsp site. Google should be able to find it. Does anyone know where to find some example algorithms for the pretty looking music "visualizers"? IMHO. YMMV. -- Ron Nicholson rhn AT nicholson DOT com http://www.nicholson.com/rhn/ #include <canonical.disclaimer> // only my own opinions, etc.
On Wed, 18 Feb 2004 21:03:29 +0000 (UTC), rhn@mauve.rahul.net (Ronald
H. Nicholson Jr.) wrote:

>In article <6gl6309onf0j0rkh2itkrif5jkp4s6gguf@4ax.com>, >Sherwin Huang <sherwin.eic89g@nctu.edu.tw> wrote: >>I have to implement an equalizer for our mp3 decoder. >>The equalizer must include 4 modes, which is pop, rock, classic and >>jazz. >>The equalizer and mp3 decoder are implemented using ADI-2181 DSP. >>Would you please tell me where to find the information about the 4 >>kinds of equalizer? > >Apple iTunes has eq presets with similar names, and it also shows >how each setting looks on a 10-band graphic equalizer console. > >Motorola has a application note on one method of implementing a basic >10-band eq using the 56000 on their dsp site. Google should be able >to find it. > >Does anyone know where to find some example algorithms for the >pretty looking music "visualizers"? > > >IMHO. YMMV.
Dear Jim, Jerry, Sebastian, Ronald: Thank you for your kind answer. These information is useful for me. Sherwin
Can you post the reponses from this thread back to the group?

"Sherwin Huang" <sherwin.eic89g@nctu.edu.tw> wrote in message
news:qpm930565g2ma2r56hi2ko2okpgiclre41@4ax.com...
> On Wed, 18 Feb 2004 21:03:29 +0000 (UTC), rhn@mauve.rahul.net (Ronald > H. Nicholson Jr.) wrote: > > >In article <6gl6309onf0j0rkh2itkrif5jkp4s6gguf@4ax.com>, > >Sherwin Huang <sherwin.eic89g@nctu.edu.tw> wrote: > >>I have to implement an equalizer for our mp3 decoder. > >>The equalizer must include 4 modes, which is pop, rock, classic and > >>jazz. > >>The equalizer and mp3 decoder are implemented using ADI-2181 DSP. > >>Would you please tell me where to find the information about the 4 > >>kinds of equalizer? > > > >Apple iTunes has eq presets with similar names, and it also shows > >how each setting looks on a 10-band graphic equalizer console. > > > >Motorola has a application note on one method of implementing a basic > >10-band eq using the 56000 on their dsp site. Google should be able > >to find it. > > > >Does anyone know where to find some example algorithms for the > >pretty looking music "visualizers"? > > > > > >IMHO. YMMV. > > Dear Jim, Jerry, Sebastian, Ronald: > > Thank you for your kind answer. > These information is useful for me. > > Sherwin
Andrew wrote:

> Can you post the reponses from this thread back to the group?
If you don't see them in your news reader, find the thread in http://www.groups.google.com/ Jerry -- Engineering is the art of making what you want from things you can get. &#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;
Andrew wrote:

> Can you post the reponses from this thread back to the group?
If you don't see them in your news reader, find the thread in http://www.groups.google.com/ Jerry -- Engineering is the art of making what you want from things you can get. &#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;
Can you post the reponses from this thread back to the group?

"Sherwin Huang" <sherwin.eic89g@nctu.edu.tw> wrote in message
news:qpm930565g2ma2r56hi2ko2okpgiclre41@4ax.com...
> On Wed, 18 Feb 2004 21:03:29 +0000 (UTC), rhn@mauve.rahul.net (Ronald > H. Nicholson Jr.) wrote: > > >In article <6gl6309onf0j0rkh2itkrif5jkp4s6gguf@4ax.com>, > >Sherwin Huang <sherwin.eic89g@nctu.edu.tw> wrote: > >>I have to implement an equalizer for our mp3 decoder. > >>The equalizer must include 4 modes, which is pop, rock, classic and > >>jazz. > >>The equalizer and mp3 decoder are implemented using ADI-2181 DSP. > >>Would you please tell me where to find the information about the 4 > >>kinds of equalizer? > > > >Apple iTunes has eq presets with similar names, and it also shows > >how each setting looks on a 10-band graphic equalizer console. > > > >Motorola has a application note on one method of implementing a basic > >10-band eq using the 56000 on their dsp site. Google should be able > >to find it. > > > >Does anyone know where to find some example algorithms for the > >pretty looking music "visualizers"? > > > > > >IMHO. YMMV. > > Dear Jim, Jerry, Sebastian, Ronald: > > Thank you for your kind answer. > These information is useful for me. > > Sherwin
On Wed, 18 Feb 2004 21:03:29 +0000 (UTC), rhn@mauve.rahul.net (Ronald
H. Nicholson Jr.) wrote:

>In article <6gl6309onf0j0rkh2itkrif5jkp4s6gguf@4ax.com>, >Sherwin Huang <sherwin.eic89g@nctu.edu.tw> wrote: >>I have to implement an equalizer for our mp3 decoder. >>The equalizer must include 4 modes, which is pop, rock, classic and >>jazz. >>The equalizer and mp3 decoder are implemented using ADI-2181 DSP. >>Would you please tell me where to find the information about the 4 >>kinds of equalizer? > >Apple iTunes has eq presets with similar names, and it also shows >how each setting looks on a 10-band graphic equalizer console. > >Motorola has a application note on one method of implementing a basic >10-band eq using the 56000 on their dsp site. Google should be able >to find it. > >Does anyone know where to find some example algorithms for the >pretty looking music "visualizers"? > > >IMHO. YMMV.
Dear Jim, Jerry, Sebastian, Ronald: Thank you for your kind answer. These information is useful for me. Sherwin
In article <6gl6309onf0j0rkh2itkrif5jkp4s6gguf@4ax.com>,
Sherwin Huang  <sherwin.eic89g@nctu.edu.tw> wrote:
>I have to implement an equalizer for our mp3 decoder. >The equalizer must include 4 modes, which is pop, rock, classic and >jazz. >The equalizer and mp3 decoder are implemented using ADI-2181 DSP. >Would you please tell me where to find the information about the 4 >kinds of equalizer?
Apple iTunes has eq presets with similar names, and it also shows how each setting looks on a 10-band graphic equalizer console. Motorola has a application note on one method of implementing a basic 10-band eq using the 56000 on their dsp site. Google should be able to find it. Does anyone know where to find some example algorithms for the pretty looking music "visualizers"? IMHO. YMMV. -- Ron Nicholson rhn AT nicholson DOT com http://www.nicholson.com/rhn/ #include <canonical.disclaimer> // only my own opinions, etc.
On Wed, 18 Feb 2004, Jim Thomas wrote:

> Pop: Rock: Classic: Jazz > []----------- -----------[] -----[]------ -[]---------- > []----------- -----------[] -----[]------ ----[]------- > []----------- -----------[] -----[]------ --------[]--- > []----------- -----------[] -----[]------ ---------[]-- > []----------- -----------[] -----[]------ -------[]---- > []----------- -----------[] -----[]------ -----[]------ > []----------- -----------[] -----[]------ ---------[]-- > []----------- -----------[] -----[]------ -------[]----
Doesn't the Rock-setting usually look like this ? --------[]-- ------[]---- ----[]------ --[]-------- --[]-------- ----[]------ ------[]---- --------[]-- ;-) Honestly: I own a portable mp3-player with selectable EQ presets (like the ones that have been mentioned by Jim - they all sound bad except the setting "Standard" - which I guess turns the "EQ" off) IMO the only reason why manufactures include this crap is to extends the feature list. @Jim: Sorry, I had nothing much contributing stuff to say - I just wanted to let you know that these EQ-presets are of no great use. Ghis! Sebastian -- PGP-Key-ID (long): 572B1778A4CA0707
Sherwin Huang wrote:

> On Wed, 18 Feb 2004 10:35:01 -0500, Jim Thomas <jthomas@bittware.com> > wrote: > > >>Sherwin Huang wrote: >> >>>Hello >>>I am a new engineer in the DSP field. >>>I have to implement an equalizer for our mp3 decoder. >>>The equalizer must include 4 modes, which is pop, rock, classic and >>>jazz. >>>The equalizer and mp3 decoder are implemented using ADI-2181 DSP. >>>Would you please tell me where to find the information about the 4 >>>kinds of equalizer? >> >>Sorry, but I couldn't resist ;-) >> >> Pop: Rock: Classic: Jazz >>[]----------- -----------[] -----[]------ -[]---------- >>[]----------- -----------[] -----[]------ ----[]------- >>[]----------- -----------[] -----[]------ --------[]--- >>[]----------- -----------[] -----[]------ ---------[]-- >>[]----------- -----------[] -----[]------ -------[]---- >>[]----------- -----------[] -----[]------ -----[]------ >>[]----------- -----------[] -----[]------ ---------[]-- >>[]----------- -----------[] -----[]------ -------[]---- > > > > Thank you for your response!! ;-)
The display in my Subaru radio shows an interesting pattern. You might look at a low-end car radio, the kind with a few choices rather than am equalizer. (My radio also has bass and treble controls when I activate them.) The only difference I see in Jim's first three settings is volume. I take it you sat the joke. Jerry -- Engineering is the art of making what you want from things you can get. &#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;&#2013266095;
On Wed, 18 Feb 2004 10:35:01 -0500, Jim Thomas <jthomas@bittware.com>
wrote:

>Sherwin Huang wrote: >> Hello >> I am a new engineer in the DSP field. >> I have to implement an equalizer for our mp3 decoder. >> The equalizer must include 4 modes, which is pop, rock, classic and >> jazz. >> The equalizer and mp3 decoder are implemented using ADI-2181 DSP. >> Would you please tell me where to find the information about the 4 >> kinds of equalizer? > >Sorry, but I couldn't resist ;-) > > Pop: Rock: Classic: Jazz >[]----------- -----------[] -----[]------ -[]---------- >[]----------- -----------[] -----[]------ ----[]------- >[]----------- -----------[] -----[]------ --------[]--- >[]----------- -----------[] -----[]------ ---------[]-- >[]----------- -----------[] -----[]------ -------[]---- >[]----------- -----------[] -----[]------ -----[]------ >[]----------- -----------[] -----[]------ ---------[]-- >[]----------- -----------[] -----[]------ -------[]----
Thank you for your response!! ;-)
Sherwin Huang wrote:
> Hello > I am a new engineer in the DSP field. > I have to implement an equalizer for our mp3 decoder. > The equalizer must include 4 modes, which is pop, rock, classic and > jazz. > The equalizer and mp3 decoder are implemented using ADI-2181 DSP. > Would you please tell me where to find the information about the 4 > kinds of equalizer?
Sorry, but I couldn't resist ;-) Pop: Rock: Classic: Jazz []----------- -----------[] -----[]------ -[]---------- []----------- -----------[] -----[]------ ----[]------- []----------- -----------[] -----[]------ --------[]--- []----------- -----------[] -----[]------ ---------[]-- []----------- -----------[] -----[]------ -------[]---- []----------- -----------[] -----[]------ -----[]------ []----------- -----------[] -----[]------ ---------[]-- []----------- -----------[] -----[]------ -------[]---- -- Jim Thomas Principal Applications Engineer Bittware, Inc jthomas@bittware.com http://www.bittware.com (703) 779-7770 When you have a new hammer, the whole world looks like a nail.
Hello
I am a new engineer in the DSP field.
I have to implement an equalizer for our mp3 decoder.
The equalizer must include 4 modes, which is pop, rock, classic and
jazz.
The equalizer and mp3 decoder are implemented using ADI-2181 DSP.
Would you please tell me where to find the information about the 4
kinds of equalizer?

Thanks in advance.
Sherwin