# Pianoteq: how to increase the internal sample rate?

**URL:** <https://discourse.zynthian.org/t/pianoteq-how-to-increase-the-internal-sample-rate/2886>\
**Category:** Software\
**Created:** [April 11, 2019, 4:10pm UTC](https://discourse.zynthian.org/t/pianoteq-how-to-increase-the-internal-sample-rate/2886 "2019-04-11T16:10:29Z")\
**Posts on this page:** 8\
**Page:** 1

<div class="post-metadata">

**Author:** ![sadkermit](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/sadkermit/32/1616_2.png) [@sadkermit](https://discourse.zynthian.org/u/sadkermit)\
**Post date:** [April 11, 2019, 4:10pm UTC](https://discourse.zynthian.org/t/pianoteq-how-to-increase-the-internal-sample-rate/2886/1 "2019-04-11T16:10:30Z")

</div>

Hello Zynthianers!  
Since after the undervoltage/PSU revolution (see this topic [On-Screen Status Info on Zynthian-UI: CPU-load, MIDI-IN, xrun, undervoltage & overtemperature](https://discourse.zynthian.org/t/on-screen-status-info-on-zynthian-ui-cpu-load-midi-in-xrun-undervoltage-overtemperature/2829)) on my Z it seems almost impossible to cause xruns using Pianoteq, I would like to test it with an higher internal sample rate: apart from doing it from the GUI, any suggestion to tweak permanently the settings (and go back if horrible things start to happen…)? I’m also wondering about two other issues: can the HiFiBerry DAC+ PRO version potentially help in freeing some CPU cycle? And in the event of overheating are the self-adhesive CPU coolers of any use?  
As always, thanks for all your help and work! ❤  
Andrea

---

<div class="post-metadata">

**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [April 11, 2019, 4:24pm UTC](https://discourse.zynthian.org/t/pianoteq-how-to-increase-the-internal-sample-rate/2886/2 "2019-04-11T16:24:04Z")

</div>

> [@sadkermit](#):
>
> Since after the undervoltage/PSU revolution (see this topic [On-Screen Status Info on Zynthian-UI: CPU-load, MIDI-IN, xrun, undervoltage & overtemperature](https://discourse.zynthian.org/t/on-screen-status-info-on-zynthian-ui-cpu-load-midi-in-xrun-undervoltage-overtemperature/2829))

Shudders . . . . 😃  
I stick coolers on to my Pi’s as a matter of course. Can’t say it’s beneficial or not but it shows a little love. . . . .

…eye’s narrow . . . … . 🤨

hold on . . . .🧐

---

<div class="post-metadata">

**Author:** ![mj\_prod](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/mj_prod/32/1920_2.png) [@mj\_prod](https://discourse.zynthian.org/u/mj_prod)\
**Post date:** [April 11, 2019, 10:31pm UTC](https://discourse.zynthian.org/t/pianoteq-how-to-increase-the-internal-sample-rate/2886/3 "2019-04-11T22:31:58Z")

</div>

Hello @sadkermit and @wyleu ,

I use the Pi 3B + that came with my kit without an extra heatsink,  
but I use the Hifiberry DAC+ PRO XLR with it.  
According to the HifiBerry boards overview [here](https://www.hifiberry.com/wp-content/uploads/2015/09/product-matrix.pdf),  
the DAC+ PRO models only have a dual low-jitter clock generator of their own.  
I don’t know how much it affects CPU performance compared to the internal RPi clock handling the audio.  
Is there a testmethod other than the performance monitor inside Pianoteq to test it?

Greetings and God bless, Marius

---

<div class="post-metadata">

**Author:** ![jofemodo](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/jofemodo/32/2_2.png) [@jofemodo](https://discourse.zynthian.org/u/jofemodo)\
**Post date:** [April 12, 2019, 12:32am UTC](https://discourse.zynthian.org/t/pianoteq-how-to-increase-the-internal-sample-rate/2886/4 "2019-04-12T00:32:08Z")

</div>

I wouldn’t expect any CPU performance difference between DAC+ and DAC+pro. In fact, any I2S device should have the same performance. Using an external low-jitter clock should not make a measurable difference regarding CPU usage.  
Quality should be better because of lower jitter, and measuring that could be quite interesting, but you need a good oscilloscope with spectrum analyzer 😉

---

<div class="post-metadata">

**Author:** ![sadkermit](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/sadkermit/32/1616_2.png) [@sadkermit](https://discourse.zynthian.org/u/sadkermit)\
**Post date:** [April 12, 2019, 7:25am UTC](https://discourse.zynthian.org/t/pianoteq-how-to-increase-the-internal-sample-rate/2886/5 "2019-04-12T07:25:34Z")

</div>

Thanks @wyleu + @mj_prod + @jofemodo !!  
Any suggestion about the Pteq sample rate?

(ps: I ❤ this place!)

---

<div class="post-metadata">

**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [April 12, 2019, 9:08am UTC](https://discourse.zynthian.org/t/pianoteq-how-to-increase-the-internal-sample-rate/2886/6 "2019-04-12T09:08:08Z")

</div>

I suspect a fair bit is known about the Pteq sample rate round here . . . 😃

🧐  
Now, recently whilst checking back records it has come to the attention of the authorities ( viz ancient scrolls passim .). That at or about January you reported the click introduced by mis positioned alsa handing… Is this not so?

…and said issue was [Solved] in the mutually agreed fashion…?

Yes…?

Well we have no record of your audio completion submission for this [solved] incident …?

Yeaaahhh.s .

So we require a little musical something in payment of the mutual debts. . . .😃

and also cos I reckon it will be interesting… !  
…there’s pressure …!! 😏

---

<div class="post-metadata">

**Author:** ![sadkermit](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/sadkermit/32/1616_2.png) [@sadkermit](https://discourse.zynthian.org/u/sadkermit)\
**Post date:** [April 14, 2019, 8:11am UTC](https://discourse.zynthian.org/t/pianoteq-how-to-increase-the-internal-sample-rate/2886/7 "2019-04-14T08:11:49Z")

</div>

😬 ehm, I will pay my dues, Your Honour, you have my solemn word…

---

<div class="post-metadata">

**Author:** ![wyleu](https://discourse.zynthian.org/user_avatar/discourse.zynthian.org/wyleu/32/514_2.png) [@wyleu](https://discourse.zynthian.org/u/wyleu)\
**Post date:** [April 14, 2019, 10:00am UTC](https://discourse.zynthian.org/t/pianoteq-how-to-increase-the-internal-sample-rate/2886/8 "2019-04-14T10:00:19Z")

</div>

Exxxxcccelllllenttttt… Reaches for unfeasibly large goose quill pen and makes copiously close written notes…