The tweaking loop rarely ends because the sound is finished. It ends because something outside the sound forces it to end: a milestone, a client's approval, a revision budget running out, or a ship date that does not move. The sounds themselves never signal completion. A jump sound can always be 2 ms tighter, a hit can always carry a little more low-mid weight, and the footstep variation set can always have one more sample.
The useful distinction is not between “rough” and “finished.” It is between a sound that is still answering a mechanic question and a sound that is answering a world question. Those are different jobs, and they have different stopping conditions. Confusing them is why solo developers and small teams end up polishing a placeholder that was supposed to be temporary, or shipping a prototype that was never meant to carry the final experience. The principle that separates the two phases is blunt: sound is added after the mechanic feels right, not before, because polish on a broken mechanic is wasted effort.
The Prototype Question: Does the Mechanic Read Without the Sound?
A prototype sound effect has one job: to tell you whether the mechanic underneath it is legible. It is not there to make the game feel good in a final sense. It is there to expose whether a jump has a readable arc, whether a hit has a readable weight, and whether a UI confirm is distinguishable from a UI cancel when the player is moving quickly. The UI sound design guide puts the same idea in system terms: sounds should be grouped by what they communicate, and a hover sound should never be as loud or as long as a confirmation sound. In prototype, you are checking whether that hierarchy is even possible, not whether it is beautiful.
The practical signal that the prototype question is answered is simple, and it is not a listening test. Mute the game and play the mechanic. Then play it with the placeholder sound. If the mechanic reads the same way in both conditions — the timing is clear, the input feels responsive, the feedback arrives on the expected frame — the sound has done its job. It has confirmed that the mechanic does not depend on audio to be understood. That is the point where final audio becomes worth producing, not before.
This is also why placeholder sounds are legitimate in prototype. A simple generated blip on a jump, a short noise burst on an impact, or a bare click on a button is enough to evaluate feel. The mistake is not using placeholders; the mistake is starting to polish a placeholder before the mechanic is locked, because the mechanic may still change and take the polished sound with it. A practical reference point from a fast workflow guide is that a small prototype feature can take one to two days of design, while finalisation and delivery is a separate, shorter step — the two are not the same task and should not be blended.
The Polish Question: Can the Player Hear What the World Is Supposed to Be?
Once the mechanic is locked, the sound's job changes. It is no longer proving that the mechanic reads; it is carrying the world's texture. A footstep is no longer “a footstep” — it is a footstep on wet stone, in a tunnel, at a distance, with the weight of a character who is tired. A weapon sound is no longer “a hit” — it is a specific weapon in a specific space, with a specific material response. The audio mix hierarchy guide becomes relevant here in a way it was not in prototype: the question shifts from “does this event read” to “does this event sit in a mix that a player will inhabit for hours.”
The stopping condition for polish is harder to name because it is not a binary state. The workable version is to stop when a change no longer improves readability in context and only improves preference in isolation. A footstep that was inaudible under the music and now cuts through is a readability fix. A footstep that was already audible and now has 200 Hz more body because it sounds nicer solo is a preference change. The first is polish. The second is the beginning of the loop.
A concrete way to apply this is to mix the sound in the busiest scene it will appear in, not in an empty project. If the sound is a weapon sound effect that will fire during combat with music, footsteps, and dialogue, that context is the only one that matters. If the change does not improve the sound's legibility against those competing elements, it is not a polish fix, even if it makes the solo file sound better. The same logic applies to footstep sounds for different surfaces: the question is whether the player can tell stone from wood while moving, not whether the individual samples are attractive in a list.
The External Checkpoints That End the Loop
Because the internal signal is unreliable, the stopping decision needs external anchors. Three are practical.
Revision rounds. Audio outsourcing proposals commonly define a fixed number of revision rounds — two or three per sound or per set is a typical range, with additional rounds billed at a percentage of the original fee. One studio's published revision policy puts the usual inclusion at two to three free rounds, and notes that on a higher-budget mix, extra rounds may be charged at 15–25% of the original fee per round. The number is not universal, but the structure is: the budget itself defines a stopping point, and that point is agreed before the work begins. If you are the client, the revision round is the moment to decide whether a change is a readability fix or a preference loop. If you are the sound designer, the round is the boundary between included work and new scope.
Client or stakeholder sign-off. A long-time game audio practitioner described the stopping rule from the vendor side without hedging: when the client is happy, the work stops there and moves straight to polishing, mixing, and mastering, regardless of whether the designer's gut says to add more — and the same rule applies to sound effects. The reason this works is not that the client has better ears. It is that the client is an external signal, and an external signal is harder to rationalize away than an internal one. For a solo developer, the equivalent is a playtest: if a fresh player can identify the event and its state without being told, the sound has passed the external check, and further tweaking is preference.
A go/no-go rule for last-minute changes. Near release, the question changes again. A practical framework used for late audio changes is to accept a change only if it significantly enhances the user experience or fixes a major flaw; otherwise it waits for a patch or the next project. The wording is useful because it forces a classification: a sound that is broken, missing, or unreadable in a shipping scene is a major flaw and should go in. A sound that is already functional but could be 10% “better” is not, and the cost of a late change — retesting, re-exporting, re-validating the build — is paid against the whole schedule, not just the sound.
What to Do When the Tweaking Is Genuinely About the Wrong Thing
There is a specific failure mode that looks like perfectionism but is actually a category error: the sound is being tweaked to fix a problem that the sound cannot fix. A hit that does not feel weighty because the knockback is wrong will not be fixed by a heavier low-end layer. A jump that feels floaty because the gravity curve is wrong will not be fixed by a longer pitch sweep. The principle from the sound-timing guidance is direct: sound cannot save bad mechanics, and sound polish on broken mechanics is wasted effort.
The check is to ask what would change if the sound were removed. If the mechanic becomes unreadable, the sound is doing its job and further tweaking is polish. If the mechanic is still unreadable with the sound, the problem is in the mechanic, not the sound, and no amount of audio work will resolve it. In that case, the correct move is to stop tweaking the sound and go back to the mechanic. The sound can be revisited once the underlying behavior is correct.
A Practical Rule for Shipping
The rule that holds up across prototype, polish, and release is this: a sound is finished when it answers the question it was created to answer, and no longer when it answers a question nobody asked. In prototype, the question is “does the mechanic read.” In polish, the question is “does the event read in context.” At release, the question is “is anything broken.” None of those questions require the sound to be the best it could possibly be in isolation. They require it to pass the test that the phase is actually asking.
If you are still in the phase where a generated placeholder is doing the work, the AI sound effects for game prototyping guide covers how to get a usable temporary sound quickly so you can test the mechanic without investing in final audio. Once the mechanic is locked, the work shifts to context, variation, and mix — and that is where the external checkpoints above become the thing that lets you ship.