I don't understand why these lines make sound:

f1 0 2 10 1
f1 0 3 10 1

Tried it with poscil3. What's going on in the code that makes this
possible? It seems that I would get silence as the vals should be 0,
right? Or am I missing something important?

Thanks.

With a length of 2, the first sample in the table should be the
average value of the first half of a sine wave cycle, and the second
should be the average value of the second half; with a length of three
each sample should be the average value of its third of the cycle.

On Thu, Oct 18, 2012 at 5:33 PM, Adam Puckett  wrote:
> I don't understand why these lines make sound:
>
> f1 0 2 10 1
> f1 0 3 10 1
>
> Tried it with poscil3. What's going on in the code that makes this
> possible? It seems that I would get silence as the vals should be 0,
> right? Or am I missing something important?
>
> Thanks.
>
>
> Send bugs reports to the Sourceforge bug tracker
>             https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>

Of course! I forgot about post-normalization (which brings the
greatest value of the table up to 1 and the least down to 0, and
arranges all others proportionally between the two). A 1 as an index
will be the same as 0, but a 1 as oscillator output does not wrap
(because csound uses float values for samples). So a sine table of
length 2 is simply a square table.

On Thu, Oct 18, 2012 at 9:39 PM, Takahiko Tsuchiya  wrote:
> Just by looking with the table opcode, the index 0 and 1 have value of 0 and
> 1 respectively. If you don't normalize, the values appear to be 0 and 0.
>
> Takahiko
>
>
> On Thu, Oct 18, 2012 at 9:52 PM, Justin Smith  wrote:
>>
>> With a length of 2, the first sample in the table should be the
>> average value of the first half of a sine wave cycle, and the second
>> should be the average value of the second half; with a length of three
>> each sample should be the average value of its third of the cycle.
>>
>> On Thu, Oct 18, 2012 at 5:33 PM, Adam Puckett 
>> wrote:
>> > I don't understand why these lines make sound:
>> >
>> > f1 0 2 10 1
>> > f1 0 3 10 1
>> >
>> > Tried it with poscil3. What's going on in the code that makes this
>> > possible? It seems that I would get silence as the vals should be 0,
>> > right? Or am I missing something important?
>> >
>> > Thanks.
>> >
>> >
>> > Send bugs reports to the Sourceforge bug tracker
>> >             https://sourceforge.net/tracker/?group_id=81968&atid=564599
>> > Discussions of bugs and features can be posted here
>> > To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
>> > csound"
>> >
>>
>>
>> Send bugs reports to the Sourceforge bug tracker
>>             https://sourceforge.net/tracker/?group_id=81968&atid=564599
>> Discussions of bugs and features can be posted here
>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
>> csound"
>>
>

Interesting. It doesn't sound like a square wave though.

On 10/19/12, Justin Smith  wrote:
> Of course! I forgot about post-normalization (which brings the
> greatest value of the table up to 1 and the least down to 0, and
> arranges all others proportionally between the two). A 1 as an index
> will be the same as 0, but a 1 as oscillator output does not wrap
> (because csound uses float values for samples). So a sine table of
> length 2 is simply a square table.
>
> On Thu, Oct 18, 2012 at 9:39 PM, Takahiko Tsuchiya 
> wrote:
>> Just by looking with the table opcode, the index 0 and 1 have value of 0
>> and
>> 1 respectively. If you don't normalize, the values appear to be 0 and 0.
>>
>> Takahiko
>>
>>
>> On Thu, Oct 18, 2012 at 9:52 PM, Justin Smith 
>> wrote:
>>>
>>> With a length of 2, the first sample in the table should be the
>>> average value of the first half of a sine wave cycle, and the second
>>> should be the average value of the second half; with a length of three
>>> each sample should be the average value of its third of the cycle.
>>>
>>> On Thu, Oct 18, 2012 at 5:33 PM, Adam Puckett 
>>> wrote:
>>> > I don't understand why these lines make sound:
>>> >
>>> > f1 0 2 10 1
>>> > f1 0 3 10 1
>>> >
>>> > Tried it with poscil3. What's going on in the code that makes this
>>> > possible? It seems that I would get silence as the vals should be 0,
>>> > right? Or am I missing something important?
>>> >
>>> > Thanks.
>>> >
>>> >
>>> > Send bugs reports to the Sourceforge bug tracker
>>> >
>>> > https://sourceforge.net/tracker/?group_id=81968&atid=564599
>>> > Discussions of bugs and features can be posted here
>>> > To unsubscribe, send email sympa@lists.bath.ac.uk with body
>>> > "unsubscribe
>>> > csound"
>>> >
>>>
>>>
>>> Send bugs reports to the Sourceforge bug tracker
>>>             https://sourceforge.net/tracker/?group_id=81968&atid=564599
>>> Discussions of bugs and features can be posted here
>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
>>> csound"
>>>
>>
>
>
> Send bugs reports to the Sourceforge bug tracker
>             https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
> csound"
>
>

If you use a linear interpolating oscillator, it should be a
non-band-limited triangle wave, with no interpolation a square wave. I
am not sure what four point interpolation would even do with a table
containing two points.

On Fri, Oct 19, 2012 at 6:27 AM, Adam Puckett  wrote:
> Interesting. It doesn't sound like a square wave though.
>
> On 10/19/12, Justin Smith  wrote:
>> Of course! I forgot about post-normalization (which brings the
>> greatest value of the table up to 1 and the least down to 0, and
>> arranges all others proportionally between the two). A 1 as an index
>> will be the same as 0, but a 1 as oscillator output does not wrap
>> (because csound uses float values for samples). So a sine table of
>> length 2 is simply a square table.
>>
>> On Thu, Oct 18, 2012 at 9:39 PM, Takahiko Tsuchiya 
>> wrote:
>>> Just by looking with the table opcode, the index 0 and 1 have value of 0
>>> and
>>> 1 respectively. If you don't normalize, the values appear to be 0 and 0.
>>>
>>> Takahiko
>>>
>>>
>>> On Thu, Oct 18, 2012 at 9:52 PM, Justin Smith 
>>> wrote:
>>>>
>>>> With a length of 2, the first sample in the table should be the
>>>> average value of the first half of a sine wave cycle, and the second
>>>> should be the average value of the second half; with a length of three
>>>> each sample should be the average value of its third of the cycle.
>>>>
>>>> On Thu, Oct 18, 2012 at 5:33 PM, Adam Puckett 
>>>> wrote:
>>>> > I don't understand why these lines make sound:
>>>> >
>>>> > f1 0 2 10 1
>>>> > f1 0 3 10 1
>>>> >
>>>> > Tried it with poscil3. What's going on in the code that makes this
>>>> > possible? It seems that I would get silence as the vals should be 0,
>>>> > right? Or am I missing something important?
>>>> >
>>>> > Thanks.
>>>> >
>>>> >
>>>> > Send bugs reports to the Sourceforge bug tracker
>>>> >
>>>> > https://sourceforge.net/tracker/?group_id=81968&atid=564599
>>>> > Discussions of bugs and features can be posted here
>>>> > To unsubscribe, send email sympa@lists.bath.ac.uk with body
>>>> > "unsubscribe
>>>> > csound"
>>>> >
>>>>
>>>>
>>>> Send bugs reports to the Sourceforge bug tracker
>>>>             https://sourceforge.net/tracker/?group_id=81968&atid=564599
>>>> Discussions of bugs and features can be posted here
>>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
>>>> csound"
>>>>
>>>
>>
>>
>> Send bugs reports to the Sourceforge bug tracker
>>             https://sourceforge.net/tracker/?group_id=81968&atid=564599
>> Discussions of bugs and features can be posted here
>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
>> csound"
>>
>>
>
>
> Send bugs reports to the Sourceforge bug tracker
>             https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>

In the code it looks like it just uses linear. So it would be a
triangle wave I guess.

On 10/19/12, Justin Smith  wrote:
> If you use a linear interpolating oscillator, it should be a
> non-band-limited triangle wave, with no interpolation a square wave. I
> am not sure what four point interpolation would even do with a table
> containing two points.
>
> On Fri, Oct 19, 2012 at 6:27 AM, Adam Puckett 
> wrote:
>> Interesting. It doesn't sound like a square wave though.
>>
>> On 10/19/12, Justin Smith  wrote:
>>> Of course! I forgot about post-normalization (which brings the
>>> greatest value of the table up to 1 and the least down to 0, and
>>> arranges all others proportionally between the two). A 1 as an index
>>> will be the same as 0, but a 1 as oscillator output does not wrap
>>> (because csound uses float values for samples). So a sine table of
>>> length 2 is simply a square table.
>>>
>>> On Thu, Oct 18, 2012 at 9:39 PM, Takahiko Tsuchiya 
>>> wrote:
>>>> Just by looking with the table opcode, the index 0 and 1 have value of
>>>> 0
>>>> and
>>>> 1 respectively. If you don't normalize, the values appear to be 0 and
>>>> 0.
>>>>
>>>> Takahiko
>>>>
>>>>
>>>> On Thu, Oct 18, 2012 at 9:52 PM, Justin Smith 
>>>> wrote:
>>>>>
>>>>> With a length of 2, the first sample in the table should be the
>>>>> average value of the first half of a sine wave cycle, and the second
>>>>> should be the average value of the second half; with a length of three
>>>>> each sample should be the average value of its third of the cycle.
>>>>>
>>>>> On Thu, Oct 18, 2012 at 5:33 PM, Adam Puckett
>>>>> 
>>>>> wrote:
>>>>> > I don't understand why these lines make sound:
>>>>> >
>>>>> > f1 0 2 10 1
>>>>> > f1 0 3 10 1
>>>>> >
>>>>> > Tried it with poscil3. What's going on in the code that makes this
>>>>> > possible? It seems that I would get silence as the vals should be 0,
>>>>> > right? Or am I missing something important?
>>>>> >
>>>>> > Thanks.
>>>>> >
>>>>> >
>>>>> > Send bugs reports to the Sourceforge bug tracker
>>>>> >
>>>>> > https://sourceforge.net/tracker/?group_id=81968&atid=564599
>>>>> > Discussions of bugs and features can be posted here
>>>>> > To unsubscribe, send email sympa@lists.bath.ac.uk with body
>>>>> > "unsubscribe
>>>>> > csound"
>>>>> >
>>>>>
>>>>>
>>>>> Send bugs reports to the Sourceforge bug tracker
>>>>>
>>>>> https://sourceforge.net/tracker/?group_id=81968&atid=564599
>>>>> Discussions of bugs and features can be posted here
>>>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body
>>>>> "unsubscribe
>>>>> csound"
>>>>>
>>>>
>>>
>>>
>>> Send bugs reports to the Sourceforge bug tracker
>>>             https://sourceforge.net/tracker/?group_id=81968&atid=564599
>>> Discussions of bugs and features can be posted here
>>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
>>> csound"
>>>
>>>
>>
>>
>> Send bugs reports to the Sourceforge bug tracker
>>             https://sourceforge.net/tracker/?group_id=81968&atid=564599
>> Discussions of bugs and features can be posted here
>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
>> csound"
>>
>
>
> Send bugs reports to the Sourceforge bug tracker
>             https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
> csound"
>
>